Connect 2 DropDownList And Received Input String Was Not In A Correct Format

Jul 26, 2007

I have 2 DropDownList, the first one to display the product category and the other one to display the products based on the selected category. However, when I run code I received the following error message: Input string was not in a correct format.

Please find the code below.

Thanks,

Andy.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server"><title>Untitled Page</title>

</head>

<body>

<form id="form1" runat="server">

<div>

<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource1"

DataTextField="Name" DataValueField="Name">

</asp:DropDownList>

 

<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Assignment2ConnectionString %>"

SelectCommand="SELECT [Name] FROM [Category]"></asp:SqlDataSource>

<br />

 

<asp:DropDownList ID="DropDownList2" runat="server" DataSourceID="SqlDataSource2"

DataTextField="Name" DataValueField="Name">

</asp:DropDownList>

 

<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:Assignment2ConnectionString %>"

SelectCommand="SELECT [Name] FROM [Product] WHERE ([CategoryID] = @CategoryID2)">

<SelectParameters>

<asp:ControlParameter ControlID="DropDownList1" Name="CategoryID2" PropertyName="SelectedValue"

Type="Int32" />

</SelectParameters>

</asp:SqlDataSource>

 

</div></form>

</body>

</html>

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Input String Was Not In A Correct Format.

Aug 8, 2006

I get this error when executing a stored procedure from my code. I suppose something's going wrong with data types, but I cannot see what. If anyone has a sharper eye and can see what it is, please let me know. Thanks in advance!Here is a code excerpt:         int category = Convert.ToInt32(ddlCategories.SelectedValue);        int museum = Convert.ToInt32(ddlMuseums.SelectedValue);        int collection = Convert.ToInt32(ddlCollections.SelectedValue);        string binomen = txtScientName.Text;        string locality = txtLocality.Text;        command.CommandType = CommandType.StoredProcedure;        command.Parameters.Add(new SqlParameter("@taxparent", category));        command.Parameters.Add(new SqlParameter("@museum", museum));        command.Parameters.Add(new SqlParameter("@collection", collection));        command.Parameters.Add(new SqlParameter("@binomen", binomen));        command.Parameters.Add(new SqlParameter("@locality", locality));And the stored procedure code: ALTER PROCEDURE [petrander].[DynamicQuery]     @taxparent int = NULL,     @museum int = NULL,     @collection int = NULL,     @binomen Nvarchar(254) = NULL,     @locality Nvarchar(254) = NULLAS    SELECT *    FROM QueryView    WHERE         InstitutionCode = COALESCE(@museum, InstitutionCode) AND        CollectionCode = COALESCE(@collection, CollectionCode) AND        ScientificName LIKE '%' + @binomen + '%' AND         Locality LIKE '%' + @locality + '%' AND         ParentID1 = COALESCE(@taxparent, ParentID3) OR        ParentID2 = COALESCE(@taxparent, ParentID2) OR        ParentID3 = COALESCE(@taxparent, ParentID3) OR        ParentID4 = COALESCE(@taxparent, ParentID4) OR        ParentID5 = COALESCE(@taxparent, ParentID5) OR        ParentID6 = COALESCE(@taxparent, ParentID6) OR        ParentID7 = COALESCE(@taxparent, ParentID7) OR        ParentID8 = COALESCE(@taxparent, ParentID8)

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May 21, 2007

I am using SQL Server Express and Visual Web Developer Express with VB as my preferred language.
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My Code is:
<InsertParameters>
<asp:Parameter Name="ProjectID" Type="Int32" DefaultValue="Convert.ToInt32(Label1.Text)" />
<asp:Parameter Name="Name" Type="String" />
<asp:Parameter Name="Description" Type="String" />
<asp:Parameter Name="Size" Type="Int32" />
</InsertParameters>
</asp:SqlDataSource>
I get the error message above and the detail is:
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.FormatException: Input string was not in a correct format.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:




[FormatException: Input string was not in a correct format.]
System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +2753299
System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +102
System.String.System.IConvertible.ToInt32(IFormatProvider provider) +43
System.Convert.ChangeType(Object value, TypeCode typeCode, IFormatProvider provider) +293
System.Web.UI.WebControls.Parameter.GetValue(Object value, String defaultValue, TypeCode type, Boolean convertEmptyStringToNull, Boolean ignoreNullableTypeChanges) +248
System.Web.UI.WebControls.Parameter.get_ParameterValue() +67
System.Web.UI.WebControls.ParameterCollection.GetValues(HttpContext context, Control control) +255
System.Web.UI.WebControls.SqlDataSourceView.InitializeParameters(DbCommand command, ParameterCollection parameters, IDictionary exclusionList) +265
System.Web.UI.WebControls.SqlDataSourceView.ExecuteInsert(IDictionary values) +214
System.Web.UI.DataSourceView.Insert(IDictionary values, DataSourceViewOperationCallback callback) +68
System.Web.UI.WebControls.FormView.HandleInsert(String commandArg, Boolean causesValidation) +389
System.Web.UI.WebControls.FormView.HandleEvent(EventArgs e, Boolean causesValidation, String validationGroup) +609
System.Web.UI.WebControls.FormView.OnBubbleEvent(Object source, EventArgs e) +88
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35
System.Web.UI.WebControls.FormViewRow.OnBubbleEvent(Object source, EventArgs e) +109
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35
System.Web.UI.WebControls.LinkButton.OnCommand(CommandEventArgs e) +86
System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +155
System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +172
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4921

I have verified that Label1.Text has a value that looks like an integer. What is causing the problem? Is there a better way of creating a new record in the child table and making one of the fields match the primary key of the parent table?
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Nov 15, 2007

Hi!I get this message: System.FormatException: Input string was not in a correct format.
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string Date;
string Title;
string Text;
string sUserName = HttpContext.Current.User.Identity.Name;
MembershipUser User = Membership.GetUser(sUserName);
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int NewsID = Convert.ToInt32(ViewEditNews.DataKeys[e.Item.ItemIndex]);

tbox = (TextBox)e.Item.FindControl("EditNewsDateTxt");
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tbox = (TextBox)e.Item.FindControl("EditNewsTitleTxt");
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tbox = (TextBox)e.Item.FindControl("EditNewsTextTxt");
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GetNews.UpdateCommandType = SqlDataSourceCommandType.Text;
GetNews.UpdateCommand = "UPDATE ovarvet.News SET HeadText=@Title, Text=@Text, Date=@Date, UserID=@UserID WHERE NewsID=@NewsID";
GetNews.UpdateParameters.Add("Title",TypeCode.String, Title);
GetNews.UpdateParameters.Add("Text", TypeCode.String, Text);
GetNews.UpdateParameters.Add("Date", TypeCode.String, Date);
GetNews.UpdateParameters.Add("UserID", TypeCode.UInt32, UserID);
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GetNews.Update();


ViewEditNews.DataBind();
ViewEditNews.EditItemIndex = -1;
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Mar 20, 2008

Hello, this is my code and the problem is "Input string was not in a correct format."
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connection.Open()
 percentage = CInt(TextBox1.Text)
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Hi i keep getting an error when i search based on the coachname textbox or the team name dropdown list, when I search based on the region dropdown list it works fine. The error i get is "Input string was not in a correct format"
Here is my code;
 protected void Button1_Click(object sender, EventArgs e)
{

if (this.IsValid)
{

lblResults.Text = "Here are the search results!";
}

SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["streamConnectionString"].ConnectionString);
conn.Open();

SqlCommand command = new SqlCommand("stream_FindTeam", conn);
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command.Parameters.Add("@coachName", SqlDbType.VarChar, 250).Value = coachName.Text;command.Parameters.Add("@TeamName", SqlDbType.VarChar, 250).Value = TeamList.SelectedValue;
{

if ((string.IsNullOrEmpty(Region.SelectedValue)))
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command.Parameters.Add("@regionID", DBNull.Value);
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else

{

command.Parameters.Add("@regionID", SqlDbType.Int ).Value = Region.SelectedValue;
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}

SqlDataReader reader = command.ExecuteReader();
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DataList1.DataBind();

conn.Close();

}

protected void DataList1_SelectedIndexChanged(object sender, EventArgs e)
{

}

protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
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args.IsValid = !(String.IsNullOrEmpty(coachName.Text) && TeamList.SelectedIndex == 0 && Region.SelectedIndex == 0);
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}


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@coachName varchar(100),
@TeamName varchar(100),
@regionID INT
AS
SELECT TeamID, coachName FROM Teams
WHERE coachName LIKE COALESCE(@coachName, coachName)
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[FormatException: Input string was not in a correct format.]
System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +2752899
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Sep 24, 2004

************* Edited by moderator Adec ***************
Inserted missing < code></ code> tags. Always include such
tags when including code in your postings. Don't force the
moderators to do this for you. Many readers disregard
postings without the code tags.
**************************************************

I've been workin on this a while and hope I just missed something simple. I have a login page that looks in the db for the rec_id that has the correct un/pw combo. Simple u'd think but I keep getting that error. Any help is greatly appreciated.

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Dim strPW As String = txtPW.Text

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While datareader.Read
If datareader.HasRows Then
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End If
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ElseIf Not datareader.HasRows Then
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txtPW.Text = ""
lblError.Text = "This User/Pass combo is not valid please try again!"
lblError.Visible = True
End If
datareader.Close()
SqlConnection1.Close()
End While
End Sub

cmdCheckProfUser

SELECT REC_ID
FROM dbo.HCPROFESSIONAL
WHERE (UN = @un) AND (PW = @pw)

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Code SnippetSQL: select max(id) from t1
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really strange error

this is the table t1
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select id from t1 gave me the same error as above too.

Is it because of its compatible with odbc connection for SQL Server 2005?


what is causing the problem?


Further updates!!
select id from t1 works if data type is int instead of bigint !!!
is this a problem with the SQL Server driver?

I'm connecting to the database via ODBC DSN by the way.
OS is Windows Server 2003.


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Max

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Error Message:
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