Comments by Mphirana (Top 4 by date)

Thanks pal works

<telerik:RadComboBox ID="cmbPortfolio" runat="server" AutoPostBack="True"
AllowCustomText="True"
önselectedindexchanged="cmbPortfolio_SelectedIndexChanged" AppendDataBoundItems="True" >
<items>
<telerik:RadComboBoxItem runat="server" Text="All" Value="100" />


protected void cmbPortfolio_SelectedIndexChanged(object sender, RadComboBoxSelectedIndexChangedEventArgs e)
{
if (cmbPortfolio.SelectedValue== "100")
{
SqlConnection connections = new SqlConnection(Connection());

SqlCommand commands = new SqlCommand("SELECT costID,costGoal,priority,planned,achieved,costMotivation,costStartDate,costDueDate FROM Cost", connections);

SqlDataAdapter daimagess = new SqlDataAdapter(commands);

DataTable dt = new DataTable();

daimagess.Fill(dt);

gvCost.DataSource = dt;

//gvCost.DataBind();
}

my error
Both DataSource and DataSourceID are defined on 'ctl00'. Remove one definition.

how do I bind my gridview in that item i just add