drop down list problem

Question

1.80/5 (2 votes)

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VB

Dim sql1 As String = "select * from Office_Mast where Office_Cd='" & officeCd.Trim & "' order by Office_Name"
            Dim cmd3 As New SqlCommand(sql1, conn)
            Dim dr1 As SqlDataReader
            dr1 = cmd3.ExecuteReader
            ddl_editOffice.DataTextField = "Office_Name"
            ddl_editOffice.DataValueField = "Office_Cd"
            ddl_editOffice.DataBind()
            ddl_editOffice.Items.Insert(0, "--Select--")
            If dr1.IsClosed = False Then dr1.Close()
            ddl_editOffice.SelectedValue = officeCd

i get this error while execute
'ddl_editOffice' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value
plz any one provide solution

Posted 25-Nov-13 12:38pm

UD(IA)

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ZurdoDev 25-Nov-13 19:04pm

Because the value of officeCd is not in your list of items.

2 solutions

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sahabiswarup · Accepted Answer · 2013-11-25T18:25:00

Here is one class i've provided, you just pass dropdown id, table name and table id

C#

public void PopulateDropDown(DropDownList ddlList, string tblName, string colName, string colValue, string srchCodn, Page form)
    {
        try
        {
            string sqlQuery = "Select 'Select' as " + colName + ",0 as " + colValue + " Union Select " + colName + "," + colValue + " from " + tblName;
            if (srchCodn != "")
            {
                sqlQuery += " " + srchCodn;
            }
            adp = new SqlDataAdapter(sqlQuery, conn);
            tbl = new DataTable();
            adp.Fill(tbl);
            ddlList.DataSource = tbl;
            ddlList.DataTextField = colName;
            ddlList.DataValueField = colValue;
            ddlList.DataBind();
        }
        catch (Exception ex)
        {
            MsgBox("Populate DropDown Error: " + ex.Message, form);
        }
    }

Hope this helps you to bind dropdown. Happy coding.

UD(IA) · Accepted Answer · 2013-11-30T22:56:00

Solution 2

actually problem was that when i access value from database its having spaces after value so i use trim after received value and solve problem.
Thanks to all to provide me solution.

Posted 30-Nov-13 22:56pm