Compact Framework SqlClient Classes Don't Actually Inherit From System.Data.Common.Db* Classes?
May 23, 2007
As you all know, in Framework 2.0 on the desktop platform you have the convenient "abstract" Db* classes that can be used to write more generic code. For instance System.Data.SqlClient.SqlConnection inherits from System.Data.Common.DbConnection, and so forth. Now the docs clearly say that this applies to the corresponding classes in the Compact Framework. And i have seen this implied by other web searchs I've done. However this does not seem to be the case -- or, I'm missing something somewhere.
The following simple code on the desktop platform compiles OK:
using System.Data;
using System.Data.Common;
using System.Data.SqlClient;
DbConnection conn = new SqlConnection();
However it doesn't compile in a compact framework project: "Cannot implicitly convert type 'System.Data.SqlClient.SqlConnection' to 'System.Data.Common.DbConnection'".
Reflector also indicates that the Compact Framework class doesn't inherit from DbConnection.
OK, so am I missing something here, or what was the reason that Microsoft did it differently??
Anyone have a recommendation on SSIS classes (providers and instructors)? It looks like Brian Knight's classes must be at the top of the list. His classes are always full!
i have deployed my application on server where sql server 2005 exists but if i try to connect to sql server from my development machine then it is not connecting and gives me error when
conn.open()
in my sql server it is windows authentication.
the error is general network error check network docs.
How can I tell if the System.Data.SqlServerCe assembly I am referencing is meant for Desktop use as opposed to Compact development? We are using NUnit as our testing framework and I get the following error when I attempt to execute nunit-console on my test fixture referencing SqlServerCe:
System.IO.FileLoadException : Could not load file or assembly 'System.Data.SqlServerCe, Version=9.0.242.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) ---->
System.IO.FileLoadException : Could not load file or assembly 'System.Data.SqlServerCe, Version=3.0.3600.0, Culture=neutral, PublicKeyToken=3be235df1c8d2ad3, Retargetable=Yes' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
The unit tests run fine from inside of Visual Studio using the Resharper Unit Test Runner...
I'm still trying to transition from a DB-centric view to an OO view, and I could use some help from any of you OO-design wizards out there. A very common db representation is Table A, Table B, and Table A_B, which maps the two in a one-to-many relation. E.g., create table Companies ( companyId int, name varchar ); create table Products ( productId int, name varchar ); create table Companies_Products ( companyId int, productId int ); So how does this translate into object-land? I started with: public class Product public id as integer public name as string end class public clas Company public id as integer public name as string public products as generic.list(of Product) end class OK, so far, so good -- I've represented most of my data. But I've lost some important information: given a Product object, I have no easy way to find out which company sells it. SQL: scan the Companies_Products table OO: iterate through companies, nested iteration through company.products. Do I just add a function to my data access layer that does the lookup? Is that allowed? On a side note: can anyone recommend a good intro to OO design specifically for database programmers? It seems like most of my confusion comes from issues of translating tables into classes. Thanks!
I am using SQLXML to pass data back and forth, well I am trying to. Itry to follow a tutorial but it didn't work completely. Here is myproblem. After everything executes with NO errors, my class has nodata. Here were my steps.1. In Query Analyzer, I ran my Select statement....Select * From Notifications Where UserID = '4192' and ParentID ISNULL for XML AUTOIt returned...<Notifications ID="1" UserID="4192"CreatedWhen="2004-08-31T00:00:00" ModifiedWhen="2004-08-31T00:00:00"ModifiedBy="1" Class="1" Name="CONSILIUMSOFT" Enabled="1"/>2. I saved the result in Test.xml.3. Ran XSD on it. C:Test>XSD TEST.XMLThis MS utility wrote out the schema file, TEST.XSD4. Ran XSD on it to create the class. C:Test>XSD TEST.XSD /classes/language:csThis MS utility wrote out the CS class file, TEST.cs5. Added the CS file to my project, create a class around it and thecode is below.My problem is that when I put a break point where is says BR (in thecode below), pNotifications has no data in it. All the values areNULL.ANY ideas? I getting desperate....I should mention that I am doingthis in ASP.NET and SQL 2000 sp3Ralph Kraussewww.consiliumsoft.comUse the START button? Then you need CSFastRunII...A new kind of application launcher integrated in the taskbar!ScreenShot - http://www.consiliumsoft.com/ScreenShot.jpg************CODE*******************public class CNotifications{SqlXmlCommandobjXMLCommand = newSqlXmlCommand(ConfigurationSettings.AppSettings["XMLConnectionString"]);NotificationspNotifications = new Notifications();public CNotifications(int iID){try{objXMLCommand.RootTag = "Notifications";objXMLCommand.CommandText = @"Select * From Notifications WhereUserID = '" + iID + "' and ParentID IS NULL for XML AUTO";objXMLCommand.CommandType = SqlXmlCommandType.Sql;objXMLCommand.ClientSideXml = true;XmlReader pXMLReader = objXMLCommand.ExecuteXmlReader();XmlSerializer pSerializer = newXmlSerializer(pNotifications.GetType());pNotifications = (Notifications)pSerializer.Deserialize(pXMLReader) ;pXMLReader.Close();}catch (SqlXmlException objEx){objEx.ErrorStream.Position = 0;string strErr = (new StreamReader(objEx.ErrorStream).ReadToEnd());throw new Exception (strErr);}BP}}
I am trying to use VB.NET to run SSIS packages. However I don't have the various dts namespaces available. When I attempt to import them I only have Microsoft.SqlServer.Server in intellisense.
I am running on XP sp2, VS 2005 (full install) and even went so far as to install sql 2005 sp1 full install on my local machine.
What gives with only having Microsoft.SqlServer.Server available?
I show business objects in the ReportViewer as it is described in the MSDN article [1]. In the article they only use intrinsic types like int and string as properties of the business object.
My business objects contains also structs and classes (e.g. Point) as Properties. I expected the Reporting Services to call the ToString() method if it is not an intrinsic type. But it only shows the error string "#Error" in the TextBox.
How can I show a Struct property of my business object as a report value?
[1] MSDN article: "Walkthrough: Using a Business Object Data Source with the ReportViewer Windows Forms Control in Local Processing Mode"
I work on the Clinical Surgery Department Data Application. The patient gets through the Admission, Surgery, PostSurgery and Discharge stages during his staying in the department. The Doctors just insert their medical data in to the different tables. I have three main classes: User, Patient and Portfolio ( patients portfolio ) and all the business bases on these classes. The problem is with the Classes per Medical Data Tables. The Medical tables should exist cause it includes the medical data about the patient however what is not clear: Whether I should create Business and Entity classes per each medical data table ( and this is something like 50 tables ) or I should insert all the functions in the Portfolio class and then there will be a mess of functions in one class? What is the accepted way to perform it ?
All -- Please help. I need to know how to refresh Linq-To-SQL classes after schema changes without dropping and adding them. Now, when I make a schema change (such as add or delete a column to a table), I want to "refresh" the Context.dbml file. The only way that seems to work is to drop the table from the Context.dbml designer and then add it back in. Is there a better way to do this? How are others doing this? Please advise. Thank you. -- Mark Kamoski
Hopefully someone out there will be able to help me with this question. I'm trying to setup my C# program to use the Backup and Restore classes to perform backups and restores on an SQL Express 2005 database.
From the documentation I've read... it seems that when you go to restore the database, it's a good idea to backup the current transaction log. But when I do this using the Backup.SqlBackup method I get an error saying that no database backup is detected so a log backup can't occur. I'm not sure if this has something to do with the fact that I moved my backup files from the default SQL Express/Server Backup folder to a different location. Shouldn't it know I've already performed a backup though?
And does anyone know how to set a parameter to backup to a different file location than the default? I've been doing a backup then a file move. Works the same, but it would be nice to have everything together in the Backup object.
I have created a windows library control that accesses a local sql database
I tried the following strings for connecting
Dim connectionString As String = "Data Source=localhostSQLEXPRESS;Initial Catalog=TimeSheet;Trusted_Connection = true"
Dim connectionString As String = "Data Source=localhostSQLEXPRESS;Initial Catalog=TimeSheet;Integrated Security=SSPI"
I am not running the webpage in a virtual directory but in
C:Inetpubwwwrootusercontrol
and I have a simple index.html that tries to read from an sql db but throws
the error
System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) at System.Security.PermissionSet.Demand() at System.Data.Common.DbConnectionOptions.DemandPermission() at System.Data.SqlClient.SqlConnection.PermissionDemand() at System.Data.SqlClient.SqlConnectionFactory.PermissionDemand(DbConnection outerConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection,
etc etc
The action that failed was: Demand The type of the first permission that failed was: System.Data.SqlClient.SqlClientPermission The Zone of the assembly that failed was: Trusted
I looked into the .net config utility but it says unrestricted and I tried adding it to the trusted internet zones in ie options security
I think that a windows form connecting to a sql database running in a webpage should be simple
conn.Open(); . Everything works fine when I run it from my computer. When I try to run it from a network share I get the following error,
Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
I am using Visual Studio 2005 and .Net framwork v2.0.50727.
I have a report that uses some embedded custom code. The embedded custom code is a function that execute some sql query on a sql server database.Everything works fine in Visual studio. The report gets deployed on the server successfully, however when running the report from report manager i get the following error message :
The Hidden expression for the table €˜table1€™ contains an error: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
Public function get_field() as string Dim myConnection As System.Data.SqlClient.SqlConnection Dim myCommand As System.Data.SqlClient.SqlCommand Dim data_reader As System.Data.SqlClient.SqlDataReader Dim field(100) as string Dim i as integer Dim j as integer Dim sql_field as string Dim nbr_field as integer Dim rtn_string as string
i = 0 sql_field ="Select field from mytable" myConnection = New System.Data.SqlClient.SqlConnection("Datasource=xxx.xxx.xxx.xxmydatabase;Initial Catalog=mydatabase;User Id=user1;Password=password1;") myConnection.Open() myCommand = New System.Data.SqlClient.SqlCommand(sql_field, myConnection) data_reader = myCommand.ExecuteReader() While data_reader.Read() if data_reader.HasRows then field(i)= data_reader(0).ToString() end if nbr_field = nbr_field + 1 i= i+1 End While data_reader.Close() myConnection.Close()
for j = 0 to nbr_field -1 rtn_string = rtn_string + field(j) + "," Next j
rtn_string = left(rtn_string,rtn_string.length-1) return rtn_string 'return sql_cmd 'return yes_no 'return lkupfield end function
Hi, I've written this code multiple times now. But for the first time i get an error at the line underlined. My procedure runs perfectly when i execute it through Sql Query analyzer. plzz help.. Its urgent and am unable to find the reason for this error "A first chance exception of type 'System.Data.SqlClient.SqlException' occurred in system.data.dll" Thanks !SqlConnection conn = new SqlConnection(DbConnectionString); conn.Open(); SqlCommand cmd = conn.CreateCommand(); cmd.CommandText = "dbo.rqryTradesPRR"; cmd.Parameters.Add("@COBDate",SqlDbType.DateTime).Value = "2002-10-31 00:00:00.000" ; SqlDataReader reader = cmd.ExecuteReader(); while(reader.Read()) { // have written something here
End Sub this code worked well. we know sql7 is not compatiable with vista. please tell us how to connect it wiith sql2005 . we downloaded orcas express edition beta. we created a database also. please let u know how to connect with Microsoft SQL Server Compact 3.5 (.NET Framework Data Provider for Microsoft SQL Server Compact 3.5).
Hi! I tried to save some image data, but it get truncated at 8000 (the table column is defined as Image). I then wrote a converter to try ntext-datatype instead, but it gets truncated at 4000.
The code uses only ADO entity framework for database access. Is there a way to store binary data larger than 8000 bytes? I am running SQL Compact 3.5 sp 1 BETA.
I have recently downloaded Orcas beta VS product and had no previous version of VS before. The install went clean and I have been able to generate Window apps and web apps with very little issues; however, I have one issue with running a web app using the "view in browser" option for checking an aspx page for validity. If I use the default Northwind database provided and generate an aspx form using the "DataSet" toolbox widget, the tool prompts for the datasource etc. required to generate the required code. I can select the Northwind database and select the desired columns from one of the tables. Once completed, I build the project (clean build) and then select the "view in browser" option to verify the results. The result is an error page indicating a server error -> Failed to find or load the registered .Net Framework Data Provider.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Configuration.ConfigurationErrorsException: Failed to find or load the registered .Net Framework Data Provider.
I created on odbc connection to an iSeries(as400) box and was successfull in displaying the table on the webpage! I looked into the web.config file and it appears that all the required XML data is present. Any help would be appreciated as I am fairly green when it comes the .NET world.
I am stuck with a SSIS package and I can€™t work out. Let me know what steps are the correct in order to solve this. At first I have just a Flat File Source and then Script Component, nothing else.
Error:
[Script Component [516]] Error: System.InvalidCastException: Unable to cast COM object of type 'System.__ComObject' to class type 'System.Data.SqlClient.SqlConnection'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface. at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e) at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.AcquireConnections(Object transaction) at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostAcquireConnections(IDTSManagedComponentWrapper90 wrapper, Object transaction)
Script Code (from Script Component):
' Microsoft SQL Server Integration Services user script component ' This is your new script component in Microsoft Visual Basic .NET ' ScriptMain is the entrypoint class for script components
Imports System Imports System.Data.SqlClient Imports System.Math Imports Microsoft.SqlServer.Dts.Pipeline.Wrapper Imports Microsoft.SqlServer.Dts.Runtime.Wrapper
Public Class ScriptMain Inherits UserComponent
Dim nDTS As IDTSConnectionManager90 Dim sqlConnecta As SqlConnection Dim sqlComm As SqlCommand Dim sqlParam As SqlParameter
Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)
Dim valorColumna As String Dim valorColumna10 As Double
valorColumna = Row.Column9.Substring(1, 1)
If valorColumna = "N" Then valorColumna10 = -1 * CDbl(Row.Column10 / 100) Else valorColumna10 = CDbl(Row.Column10 / 100) End If
i have installed visual express and sql express. but the problem is i want to add the connection string manuallty in visual studio express 2005. so i want to add a reference of sql.data.sqlclient but could not add ? i am not sure what is the problem or is am i missing anything
I am not able to add the namespace "system.data.SqlClient" and not able to get the intellisense for sqlconnections. I have only vs2005. i do not have sql management express or sql server 2005
I am new to ASP.NET and trying to learn. I am getting the problem when I try to insert data into SQL. The exception that I am getting is
Exception Details: System.Data.SqlClient.SqlException: An explicit value for the identity column in table 'Customers' can only be specified when a column list is used and IDENTITY_INSERT is ON.
My table name is 'Customers' and its as below. ----------------------------------------------------------------------- CustomerID--numeric---Identity Seed is 1000---Identity Increment is 1---No Nulls. Name--------varchar---No Nulls. address------Varchar---No Nulls. State--------Varchar---No Nulls. Zip-----------VarcHar---No Nulls. PhoneNumber-Varchar---No Nulls. Email---------Varchar---No Nulls.
and my code is (No fun of my code please--I am a learner) -----------------------------------------------------------------------
Imports System.Data
Imports System.Data.SqlClient
Public Class register
Inherits System.Web.UI.Page
Protected WithEvents cnNWind As SqlConnection
'Protected drCustomers As SqlDataReader
Protected WithEvents lbladd As System.Web.UI.WebControls.Label
Protected WithEvents lblState As System.Web.UI.WebControls.Label
Protected WithEvents lblcity As System.Web.UI.WebControls.Label
Protected WithEvents lblzip As System.Web.UI.WebControls.Label
Protected WithEvents lblPhone As System.Web.UI.WebControls.Label
Protected WithEvents lblEmail As System.Web.UI.WebControls.Label
Protected WithEvents TxtName As System.Web.UI.WebControls.TextBox
Protected WithEvents txtAdd As System.Web.UI.WebControls.TextBox
Protected WithEvents txtState As System.Web.UI.WebControls.TextBox
Protected WithEvents txtCity As System.Web.UI.WebControls.TextBox
Protected WithEvents txtZip As System.Web.UI.WebControls.TextBox
Protected WithEvents txtPhone As System.Web.UI.WebControls.TextBox
Protected WithEvents TxtEmail As System.Web.UI.WebControls.TextBox
Protected WithEvents BtnSubmit As System.Web.UI.WebControls.Button
Protected WithEvents Label1 As System.Web.UI.WebControls.Label
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
End Sub
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
End Sub
Private Sub BtnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles BtnSubmit.Click
Dim cmCustomers As New SqlCommand("INSERT INTO Customers VALUES ('',' " & TxtName.Text & "','" & txtAdd.Text & "','" & txtState.Text & "','" & txtZip.Text & "','" & txtPhone.Text & "','" & TxtEmail.Text & "')", cnNWind)
cmCustomers.ExecuteNonQuery()
cmCustomers.ExecuteNonQuery()
cnNWind.Close()
End If
End Sub
End Class
The Error I am getting: ----------------------------------------------------------------------- Server Error in '/SCart' Application. --------------------------------------------------------------------------------
An explicit value for the identity column in table 'Customers' can only be specified when a column list is used and IDENTITY_INSERT is ON. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: An explicit value for the identity column in table 'Customers' can only be specified when a column list is used and IDENTITY_INSERT is ON.
Source Error:
Line 46: If cnNWind.State = ConnectionState.Open Then Line 47: Dim cmCustomers As New SqlCommand("INSERT INTO Customers VALUES ('','" & TxtName.Text & "','" & txtAdd.Text & "','" & txtState.Text & "','" & txtZip.Text & "','" & txtPhone.Text & "','" & TxtEmail.Text & "')", cnNWind) Line 48: cmCustomers.ExecuteNonQuery() Line 49: cnNWind.Close() Line 50: End If
[SqlException: An explicit value for the identity column in table 'Customers' can only be specified when a column list is used and IDENTITY_INSERT is ON.] System.Data.SqlClient.SqlCommand.ExecuteNonQuery() SCart.register.BtnSubmit_Click(Object sender, EventArgs e) in d:inetpubwwwrootSCart egister.aspx.vb:48 System.Web.UI.WebControls.Button.OnClick(EventArgs e) System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) System.Web.UI.Page.ProcessRequestMain()
-------------------------------------------------------------------------------- Version Information: Microsoft .NET Framework Version:1.1.4322.573; ASP.NET Version:1.1.4322.573
The code works fine If I Dont use Identity Column, But I need to use Identity Column in my Project :( ...Please Help.
I'm trying to retrieve an image from my ms sql server 2005, and i'm using VS2005....however, i have the following error during the compilation process Code in webform2.aspx.vb:Partial Class webform2 Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim connstr As String = "Data Source=DCPRJ007SQLEXPRESS;Initial Catalog=mydatabase;Integrated Security=True" Dim cnn As New Data.SqlClient.SqlConnection(connstr) Dim cmd As New Data.SqlClient.SqlCommand("select * from dbo.images where id=" & Request.QueryString("id"), cnn) cnn.Open() Dim dr As Data.SqlClient.SqlDataReader = cmd.ExecuteReader() Dim bindata() As Byte = dr.GetValue(1) Response.BinaryWrite(bindata) End SubEnd Class System.Data.SqlClient.SqlException was unhandled by user code Class=15 ErrorCode=-2146232060 LineNumber=1 Message="Incorrect syntax near '='." Number=102 Procedure="" Server="DCPRJ007SQLEXPRESS" Source=".Net SqlClient Data Provider" State=1 StackTrace: at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlDataReader.ConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader() at webform2.Page_Load(Object sender, EventArgs e) in C:Documents and SettingsAdministratorMy DocumentsVisual Studio 2005WebSitesWebSite7webform2.aspx.vb:line 10 at System.Web.UI.Control.OnLoad(EventArgs e) at System.Web.UI.Control.LoadRecursive() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
im getting this error when i try to access the application from the network. but in my computer work fine
Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. please help... thanxs
I had make one Desktop application in VB.net, having 6 threads simultaneously running. And each thread connect to sql server and stored the value in DB at every one second. Now my problem is that when I start the application its working fine but after 20-30 minutes exception is occuring.
Login failed for user 'sa'. Exception StackTrace: at System.Data.SqlClient.ConnectionPool.CreateConnection() at System.Data.SqlClient.ConnectionPool.PoolCreateRequest(Object state)
I am using a stored procedure which returns a value of charecter datatype 'V' to the calling program.I am getting an sql exception System.Data.SqlClient.SqlException: Syntax error converting the varchar value 'V' to a column of data type inti didnot define any int datatype in my tablethis is my codeSqlCommand com = new SqlCommand("StoredProcedure4", connection);com.CommandType = CommandType.StoredProcedure; SqlParameter p1 = com.Parameters.Add("@uname", SqlDbType.NVarChar);SqlParameter p2 = com.Parameters.Add("@opwd", SqlDbType.NVarChar);SqlParameter p3 = com.Parameters.Add("@role", SqlDbType.NVarChar);p3.Direction = ParameterDirection.ReturnValue;p1.Value = username.Text.Trim();p2.Value = password.Text.Trim();com.ExecuteReader();lblerror2.Text = (string)(com.Parameters["@role"].Value); can your figure out what is the error ? Is it a coding error or error of the databse
Aaarrgghhhhhhh, still searchin' for a nice step-by-step article to learn data access (all insert delete update commands) with the SQL Server .NET Data Provider found in [System.Data.SqlClient] namespace....
Hi All, I have a form (asp website with the default.aspx and default.aspx.cs) which I use to connect to the SQL Server 2005 database and insert, update,get and delete data to and from it. In the table I have a column called Picture to insert a photo (usually bmp files) which I declared as a varbinary(max). ID is the primary key and is an int (i tried it to be numeric & varchar). I am trying to insert data into the table using a form with this syntax: SqlConnection enter_conn = new SqlConnection("user id=;" + "password=;server=servername;" + "Trusted_Connection=yes;" + "database=Member Profiles; " + "connection timeout=30"); enter_conn.Open(); string insertSql = "Insert dbo.Details(ID,Last_Name,First_Name,Middle_Initial,Project, Organization,Manager,Current_Skills,Biography,Hobbies, Picture) Select 1001, 'ABC','XYZ','R',' Website Development','ACT',LKM','ASP.Net, C#.Net, SQL Server 2005, SharePoint, Java, ',' developing the new website for ACT using SharePoint and SQL Server 2005', ' Singing, Listening to Music, Dancing, Cooking, Swimming', BulkColumn from Openrowset( Bulk 'C:\photos\rose.bmp', Single_Blob) as Picture";
SqlCommand myCommand = new SqlCommand(insertSql, enter_conn); int i = myCommand.ExecuteNonQuery();
I have no data in the table and am doing the first insert. Though the data gets inserted I am getting this exception: System.Data.SqlClient.SqlException: Violation of PRIMARY KEY constraint 'PK_Details'. Cannot insert duplicate key in object 'dbo.Details'. The statement has been terminated. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at _Default.Enter_Click(Object sender, EventArgs e) in c:Documents and SettingskrkondaXMy DocumentsVisual Studio 2005WebSitesMember ProfilesDefault.aspx.cs:line 82
Can someone please suggest anything???? I appreciate a quick response please!!!!
I am getting this error message System.Data.SqlClient.SqlException: Invalid object name 'RacingHeritage' I have noticed from other posts where the database owner is the login name I rebuilt the table and the owner is now dbo Here is the Code Function GetCustomers() As System.Data.DataSet Dim connectionString As String = Application("HiddenConnection") Dim dbConnection As System.Data.IDbConnection = New System.Data.SqlClient.SqlConnection(connectionString) Dim queryString As String = "SELECT [RacingHeritage].[RHID], [RacingHeritage].[UserID], [RacingHeritage].[Clie"& _ "ntFirstName] FROM [RacingHeritage]" Dim dbCommand As System.Data.IDbCommand = New System.Data.SqlClient.SqlCommand dbCommand.CommandText = queryString dbCommand.Connection = dbConnection Dim dataAdapter As System.Data.IDbDataAdapter = New System.Data.SqlClient.SqlDataAdapter dataAdapter.SelectCommand = dbCommand Dim dataSet As System.Data.DataSet = New System.Data.DataSet dataAdapter.Fill(dataSet) Return dataSet End Function Any Ideas
