Question

My stored procedure is like this

SELECT Id, StudentName
FROM xyz

I have a drop down list in asp.net, which I am loading as :

ddlA.DataSource = // Some source
ddlA.DataTextField = "Id" + " -" + "StudentName";
ddlA.DataValueField = "Id";
ddlA.DataBind();
ddlA.Items.Insert(0, new ListItem(" Select one", "0"));

But at the Databind() statement, I am getting this error:

System.Web.HttpException: DataBinding: ‘System.Data.DataRowView’ does not contain a property with the name ‘Id-StudentName’.

In text part of the dropdown list, I want to display the concatenated value of Id - StudentName.

How can I do it?

Answer 1

DropDownList1.DataTextFormatString = "{0} - {1}";
DropDownList1.DataTextField = "Id,StudentName";

It seems that it’s not achievable automatically, e.g. see this MS Connect ticket.

---

Thus do that programmatically:

foreach (var row in table.Rows)
{
    row.Field<string>("text") = String.Format(..);
}

or

foreach (var item in data)
{
    new ListItem { Text = String.Format(..); }; 
}