4 Layered Web Application For Inserting Data Into A Database Using Sql Server As The Back End And A Web Form As The Front End Using C#

Dec 10, 2005

4 Layered Web Application for Inserting data into a database using sql server as the back end and a web form as the front end using C# .

Can someone provide with code as I am new to this architecture and framework.

Better send email.

Thanks In Advance,

A New Bie

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Apr 21, 2008

Hi All,

I am new to MS SQL SERVER 2005.
My web application using SQL Server 2005 as back end database to store all the information.
I am using connection pooling to get connection form db.
But my fron end user( user who logged in into webapplication) lost his identity b'coz for database user is application server.
Now I wanna to track front end user in db.

In oracle I can do it by using CLIENT_IDENTIFIER. But in sql server I don't know how to do it.

in oracle i can do it as below
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PreparedStatement ps;
try {
ps =
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ps.execute();
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} catch (SQLException e) {
// Handle the exception
}
}
<!--[if !supportLineBreakNewLine]-->
once the transaction is complete, the application should reset the identity as follows:

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ps.close();
} catch (SQLException e) {
// Handle the exception
}
}
<!--[if !supportLineBreakNewLine]-->
Please guide me for same.

Thanx in advance.

Bhadu<!--[endif]-->

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I need help to resolve the following problem. 
I have a form that is supposed to insert data into my data base. But I get an error message when I click submit.
Below is the Code and after that is the error message that I get. Thank you in advance.
 
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
End SubProtected Sub insertSubmitBtn_Click(ByVal sender As Object, ByVal e As System.EventArgs)
SqlDataSource1.Insert()End Sub
</script><html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
<script type="text/javascript">
 function pageLoad() {
}
 
</script>
<style type="text/css">
.style1
{width: 34%;
}
.style2
{width: 144px;
}</style>
</head><body>
<br />
 
<form id="form1" runat="server">
 
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" />
 
<br /><asp:SqlDataSource ID="SqlDataSource1" runat="server"
InsertCommand="INSERT INTO property(provinceName, cityName, ownerName, ownerPhone, numOfRooms, rent, ownerEmail, listPeriod, addInfo)
VALUES(@provinceName, @cityName, @ownerName, @ownerPhone, @numOfRooms, @rent, @ownerEmail, @listPeriod, @addInfo)">
<InsertParameters><asp:ControlParameter ControlID="provinceddl2" Name="provinceName"
PropertyName="SelectedValue" /><asp:ControlParameter ControlID="cityddl2" Name="cityName"
PropertyName="SelectedValue" /><asp:ControlParameter ControlID="nameTxtBox" Name="ownerName"
PropertyName="Text" /><asp:ControlParameter ControlID="phoneTxtBox" Name="ownerPhone"
PropertyName="Text" /><asp:ControlParameter ControlID="roomsTxtBox" Name="numOfRooms"
PropertyName="Text" />
<asp:ControlParameter ControlID="rentTxtBox" Name="rent" PropertyName="Text" /><asp:ControlParameter ControlID="EmailTxtBox" Name="ownerEmail"
PropertyName="Text" /><asp:ControlParameter ControlID="listPeriodddl" Name="listPeriod"
PropertyName="SelectedValue" /><asp:ControlParameter ControlID="addInfoTxtBox" Name="addInfo"
PropertyName="Text" />
</InsertParameters>
</asp:SqlDataSource>
<br />
<br />
<br />
<br />
 
<table cellspacing="1" class="style1">
<tr>
<td class="style2">
Contact Name:</td>
<td>
<asp:TextBox ID="nameTxtBox" runat="server" Width="200px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style2">
Contact phone:</td>
<td>
<asp:TextBox ID="phoneTxtBox" runat="server" Width="200px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style2">
Province:</td>
<td>
<asp:DropDownList ID="provinceddl2" runat="server" Width="205px">
</asp:DropDownList>
</td>
</tr>
<tr>
<td class="style2">
City:</td>
<td>
<asp:DropDownList ID="cityddl2" runat="server" Width="205px">
</asp:DropDownList>
</td>
</tr>
<tr>
<td class="style2">
Email:</td>
<td>
<asp:TextBox ID="EmailTxtBox" runat="server" Width="200px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style2">
Number of Rooms:</td>
<td>
<asp:TextBox ID="roomsTxtBox" runat="server" Width="80px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style2">
Monthly Rent:</td>
<td>
<asp:TextBox ID="rentTxtBox" runat="server" Width="80px"></asp:TextBox>
</td>
</tr>
<tr>
<td class="style2">
Period to list:</td>
<td><asp:DropDownList ID="listPeriodddl" runat="server"
DataSourceID="listPeriodSqlDataSource" DataTextField="listDays"
DataValueField="listDays" Width="85px">
</asp:DropDownList><asp:SqlDataSource ID="listPeriodSqlDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:PlaceConnectionString1 %>"
SelectCommand="SELECT [listDays] FROM [listPeriod]"></asp:SqlDataSource>
</td>
</tr>
<tr>
<td class="style2">
Additional Infomation:</td>
<td><asp:TextBox ID="addInfoTxtBox" runat="server" Rows="5" TextMode="MultiLine"
Width="200px"></asp:TextBox>
</td>
</tr>
</table>
<br />
;&nbsp;&nbsp;&nbsp;<asp:Button ID="insertSubmitBtn" runat="server" Text="Submit" Width="140px"
onclick="insertSubmitBtn_Click" />
<br/>
 <cc1:CascadingDropDown
ID="Provincecdd2"
runat="server"
TargetControlID="Provinceddl2"
Category="Province"
PromptText="Select a province"
ServicePath="Location.asmx"
ServiceMethod="GetProvince" />
<br /><cc1:CascadingDropDown
ID="Citycdd2"
runat="server"
TargetControlID="Cityddl2"
ParentControlID="Provinceddl2"
Category="City"
PromptText="Select a city"
ServicePath="Location.asmx"
ServiceMethod="GetCity" />
 
</div></form>
</body>
</html>
 
Server Error .


Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
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.ArgumentException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.Source Error:



An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace:



[ArgumentException: Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.]
System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +2132728
System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +108
System.Web.UI.WebControls.DropDownList.LoadPostData(String postDataKey, NameValueCollection postCollection) +55
System.Web.UI.WebControls.DropDownList.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) +11
System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +353
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1194

 
Hotkwesi

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</tr>
</table>
<asp:Button ID="AddButton" runat="server" Text="Add Property" style="left: 378px; position: relative; top: 66px" /><tablestyle="border-right: silver 3px outset; border-top: silver 3px outset; left: 648px;
border-left: silver 3px outset; border-bottom: silver 3px outset; position: relative;
top: -190px">
<tr>
<td style="width: 186px">
<span style="font-size: 14pt; font-family: Bradley Hand ITC"><strong>Property Description</strong></span></td>
</tr>
<tr>
<td style="width: 186px">
<asp:TextBox ID="DescriptionTextBox" runat="server" Height="172px" Width="233px" TextMode="MultiLine"></asp:TextBox></td>
</tr>
</table><asp:FileUpload ID="PropertyPicture" runat="server" Style="left: 356px; position: relative;
top: -214px" />
<asp:SqlDataSource ID="AddProperty" runat="server" ConnectionString="<%$ ConnectionStrings:My Property PortfolioConnectionString %>"ProviderName="<%$ ConnectionStrings:My Property PortfolioConnectionString.ProviderName %>"
InsertCommand="INSERT INTO Property(User_ID, Property_type, Property_Name, Number_of_Rooms, Sleeps, Town, City, County, Country, Postcode, Description, Facility1, Facility2, Picture)
VALUES (@User_ID, @Property_type, @Property_Name, @Number_of_Rooms, @Sleeps, @Town, @City, @County, @Country, @Postcode, @Description, @Facility1, @Facility2, @Picture)">
<InsertParameters>
<asp:SessionParameter Name="User_ID" />
<asp:ControlParameter ControlID="TypeDropDownList" Name="Property_type" PropertyName="SelectedValue" />
<asp:ControlParameter ControlID="PropertyNameTextBox" Name="Property_Name" PropertyName="Text" />
<asp:ControlParameter ControlID="NoOfRoomsDropDownList" Name="Number_of_Rooms" PropertyName="SelectedValue" />
<asp:ControlParameter ControlID="SleepsDropDownList" Name="Sleeps" PropertyName="SelectedValue" />
<asp:ControlParameter ControlID="TownTextBox" Name="Town" PropertyName="Text" />
<asp:ControlParameter ControlID="CityTextBox" Name="City" PropertyName="Text" />
<asp:ControlParameter ControlID="CountyTextBox" Name="County" PropertyName="Text" />
<asp:ControlParameter ControlID="CountryTextBox" Name="Country" PropertyName="Text" />
<asp:ControlParameter ControlID="PostcodeTextBox" Name="Postcode" PropertyName="Text" />
<asp:ControlParameter ControlID="DescriptionTextBox" Name="Description" PropertyName="Text" />
<asp:ControlParameter ControlID="Facility1DropDownList" Name="Facility1" PropertyName="SelectedValue" />
<asp:ControlParameter ControlID="Facility2DropDownList" Name="Facility2" PropertyName="SelectedValue" />
<asp:Parameter Name="Picture" />
</InsertParameters>
</asp:SqlDataSource>
&nbsp;
<table style="left: 12px; position: relative; top: -411px; border-right: silver 3px outset; border-top: silver 3px outset; border-left: silver 3px outset; border-bottom: silver 3px outset;">
<tr>
<td colspan="2">
<strong><span style="font-size: 14pt; font-family: Bradley Hand ITC">
Property Details</span></strong></td>
</tr>
<tr>
<td style="width: 100px"><asp:Label ID="PropertyName" runat="server" Font-Bold="False" Height="23px" Style="vertical-align: middle;
text-align: right; font-family: 'Goudy Old Style';" Text="Property Name:" Width="101px"></asp:Label></td>
<td style="width: 100px">
<asp:TextBox ID="PropertyNameTextBox" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td style="width: 100px"><asp:Label ID="NoOfRooms" runat="server" Height="23px" Style="vertical-align: middle;
text-align: right; font-family: 'Goudy Old Style';" Text="No of Rooms:" Width="97px"></asp:Label></td>
<td style="width: 100px">
<asp:DropDownList ID="NoOfRoomsDropDownList" runat="server">
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem>5</asp:ListItem>
<asp:ListItem>6</asp:ListItem>
<asp:ListItem>7</asp:ListItem>
</asp:DropDownList></td>
</tr>
<tr>
<td style="width: 100px"><asp:Label ID="Sleeps" runat="server" Height="23px" Style="vertical-align: middle;
text-align: right; font-family: 'Goudy Old Style';" Text="Sleeps:" Width="97px"></asp:Label></td>
<td style="width: 100px">
<asp:DropDownList ID="SleepsDropDownList" runat="server">
<asp:ListItem>1</asp:ListItem>
<asp:ListItem>2</asp:ListItem>
<asp:ListItem>3</asp:ListItem>
<asp:ListItem>4</asp:ListItem>
<asp:ListItem>5</asp:ListItem>
<asp:ListItem>6</asp:ListItem>
<asp:ListItem>7</asp:ListItem>
<asp:ListItem>8</asp:ListItem>
<asp:ListItem>9</asp:ListItem>
<asp:ListItem>10</asp:ListItem>
<asp:ListItem>11</asp:ListItem>
<asp:ListItem>12</asp:ListItem>
</asp:DropDownList></td>
</tr>
<tr>
<td style="width: 100px"><asp:Label ID="Type" runat="server" Height="23px" Style="vertical-align: middle;
text-align: right; font-family: 'Goudy Old Style';" Text="Type:" Width="97px"></asp:Label></td>
<td style="width: 100px">
<asp:DropDownList ID="TypeDropDownList" runat="server">
<asp:ListItem>Bungelow</asp:ListItem>
<asp:ListItem>Appartment</asp:ListItem>
<asp:ListItem>Flat</asp:ListItem>
<asp:ListItem>Studio</asp:ListItem>
<asp:ListItem>Cottage</asp:ListItem>
<asp:ListItem>House</asp:ListItem>
</asp:DropDownList>&nbsp;
</td>
</tr>
<tr>
<td style="width: 100px"><asp:Label ID="Facility1" runat="server" Height="23px" Style="vertical-align: middle;
text-align: right; font-family: 'Goudy Old Style';" Text="Facility 1:" Width="97px"></asp:Label></td>
<td style="width: 100px">
<asp:DropDownList ID="Facility2DropDownList" runat="server">
<asp:ListItem>Air conditioning</asp:ListItem>
<asp:ListItem>Dishwasher</asp:ListItem>
<asp:ListItem>En-suit</asp:ListItem>
<asp:ListItem>Garage</asp:ListItem>
<asp:ListItem>Garden</asp:ListItem>
<asp:ListItem>Internet</asp:ListItem>
<asp:ListItem>Pool</asp:ListItem>
</asp:DropDownList>&nbsp;
</td>
</tr>
<tr>
<td style="width: 100px"><asp:Label ID="Facility2Label" runat="server" Height="23px" Style="vertical-align: middle;
text-align: right; font-family: 'Goudy Old Style';" Text="Facility 2:" Width="97px"></asp:Label></td>
<td style="width: 100px">
<asp:DropDownList ID="Facility1DropDownList" runat="server">
<asp:ListItem>Pool</asp:ListItem>
<asp:ListItem>Air conditioning</asp:ListItem>
<asp:ListItem>Dishwasher</asp:ListItem>
<asp:ListItem>En-suit</asp:ListItem>
<asp:ListItem>Garage</asp:ListItem>
<asp:ListItem>Garden</asp:ListItem>
<asp:ListItem>Internet</asp:ListItem>
</asp:DropDownList></td>
</tr></table>
</asp:Content>
property.aspx.vb page:Partial Class Default2
Inherits System.Web.UI.PageProtected Sub AddButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles AddButton.Click
AddProperty.Insert()End Sub
End Class
Many Thanks

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