Populate gridview based on ddlist

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Dear all.

I am trying to populate a grid view list with 2 editable fields.

I have created a cascading ddlist as below but on submit I am getting the following error, below the code.

Codebehind

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;


public partial class CountryDropdowns : System.Web.UI.Page
{
private String strConnection = "Data Source=£££££££££££;Initial Catalog=BIS;Persist Security Info=True;User ID=£££££££££;Password=£££££££££££££";
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
BindContrydropdown();
}

}
/// <summary>
/// Bind Departmentdropdown
/// </summary>
protected void BindContrydropdown()
{
//conenction path for database
SqlConnection con = new SqlConnection(strConnection);
con.Open();
SqlCommand cmd = new SqlCommand("SELECT [DeptSID],[DeptCode],[DeptName],[ParentSID] FROM [dbo].[vIP_Dept]", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
con.Close();
ddlCountry.DataSource = ds;
ddlCountry.DataTextField = "DeptName";
ddlCountry.DataValueField = "DeptSID";
ddlCountry.DataBind();
ddlCountry.Items.Insert(0, new ListItem("--Select--", "0"));
ddlState.Items.Insert(0, new ListItem("--Select--", "0"));
ddlRegion.Items.Insert(0, new ListItem("--Select--", "0"));

}
/// <summary>
/// Bind Curriculum Dropdown Based on CountryID
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void ddlCountry_SelectedIndexChanged(object sender, EventArgs e)
{
int CountryID = Convert.ToInt32(ddlCountry.SelectedValue);
SqlConnection con = new SqlConnection(strConnection);
con.Open();
SqlCommand cmd = new SqlCommand("SELECT [CAreaSID],[CAreaCode],[CAreaName],[ParentSID],[LedgerCode] FROM [dbo].[vIP_CurriculumArea] where ParentSID=" + CountryID, con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
con.Close();
ddlState.DataSource = ds;
ddlState.DataTextField = "CAreaName";
ddlState.DataValueField = "CAreaSID";
ddlState.DataBind();
ddlState.Items.Insert(0, new ListItem("--Select--", "0"));
if(ddlState.SelectedValue=="0")
{
ddlRegion.Items.Clear();
ddlRegion.Items.Insert(0, new ListItem("--Select--", "0"));
}

}
/// <summary>
/// Bind Course Offering dropdown based on Re
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void ddlState_SelectedIndexChanged(object sender, EventArgs e)
{
int StateID = Convert.ToInt32(ddlState.SelectedValue);
SqlConnection con = new SqlConnection(strConnection);
con.Open();
SqlCommand cmd = new SqlCommand("SELECT [CAreaSID],[OfferingCode], [OfferingDescription] FROM [dbo].[vIP_Offering] WHERE [CAreaSID] =" + StateID, con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
con.Close();
ddlRegion.DataSource = ds;
ddlRegion.DataTextField = "OfferingDescription";
ddlRegion.DataValueField = "OfferingCode";
ddlRegion.DataBind();
ddlRegion.Items.Insert(0, new ListItem("--Select--", "0"));
}
protected void Button1_Click(object sender, EventArgs e)
{
    String cc = "bit046x";
    SqlConnection con = new SqlConnection(strConnection);
    con.Open();

    SqlCommand cmd = new SqlCommand("SELECT * FROM [dbo].[vIP_Enrolment] WHERE OfferingCode = " + cc.ToString() , con);

    SqlDataAdapter da = new SqlDataAdapter(cmd);

    DataSet ds = new DataSet();

    da.Fill(ds);
    //da.Fill(ds, "Test_table");

    con.Close();


    GridView1.DataSource = ds;
    //GridView1.DataMember = "Test_table";


}


}

Invalid column name 'bit046x'. 
  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: Invalid column name 'bit046x'.

Source Error: 



Line 102:    DataSet ds = new DataSet();
Line 103:
Line 104:    da.Fill(ds);
Line 105:    //da.Fill(ds, "Test_table");
Line 106:
  

 Source File:  \\wrestastorage01\documents\marthey\My Documents\Visual Studio 2010\Projects\Example\CountryDropdowns.aspx.cs    Line:  104 

Stack Trace: 



[SqlException (0x80131904): Invalid column name 'bit046x'.]
   System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +1767866
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5352418
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +244
   System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +1691
   System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() +61
   System.Data.SqlClient.SqlDataReader.get_MetaData() +90
   System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +365
   System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader ds) +1406
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite) +177
   System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +53
   System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +134
   System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +41
   System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior) +10
   System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +140
   System.Data.Common.DbDataAdapter.Fill(DataSet dataSet, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +316
   System.Data.Common.DbDataAdapter.Fill(DataSet dataSet) +88
   CountryDropdowns.Button1_Click(Object sender, EventArgs e) in \\wrestastorage01\documents\marthey\My Documents\Visual Studio 2010\Projects\Example\CountryDropdowns.aspx.cs:104
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9633194
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +103
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724

Any suggestions greatly appreciated.

Posted 31-Oct-14 1:47am

Michael Arthey

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Comments

Mukesh Pr@sad 31-Oct-14 8:47am

String cc = "bit046x";

Here cc is already string then in query why again you are using .ToString().

following is your solution try it once, hope it should work.

SqlCommand cmd = new SqlCommand("SELECT * FROM [dbo].[vIP_Enrolment] WHERE OfferingCode = '" + cc +"'" , con);

2 solutions

Solution 2

C#

String cc = "bit046x";

SqlCommand cmd = new SqlCommand("SELECT * FROM [dbo].[vIP_Enrolment] WHERE OfferingCode = '" + cc.ToString()+"'" , con);

Posted 31-Oct-14 2:36am

kskumaran

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AnvilRanger · Accepted Answer · 2014-10-31T02:25:00

Look at the following lines:

String cc = "bit046x";

SqlCommand cmd = new SqlCommand("SELECT * FROM [dbo].[vIP_Enrolment] WHERE OfferingCode = " + cc.ToString() , con);

You are passing the value as OfferingCode as a non-string. You need to treat it like a string and wrap it in single quotes.

But you really should not be building SQL statements in this manner. You are leaving yourself open to SQL injection attacks.

You need to look at Parameterized Queries or stored procedures