get selected value from list box

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Hi,

I'm using the following code to bind the items to a List box:

C#

listAll.DataSource = string.Empty;
            listAll.DataTextField = string.Empty;
            listAll.DataValueField = string.Empty;
            SqlCommand cmd = new SqlCommand("select ID,Name from Machine_Area", con);
            SqlDataReader dr = cmd.ExecuteReader();
            //listAll.DataTextField=dr["Name"].ToString();
            //listAll.DataValueField=dr["ID"].ToString();
            while (dr.Read())
            {
                listAll.DataTextField = dr["Name"].ToString();
                listAll.DataValueField = dr["ID"].ToString();
                listAll.Items.Add(dr["Name"].ToString());
                listAll.DataBind();
            }
            dr.Close();

I want to get the datavalue of the selected item.
I tried with

SQL

listAll.SelectedValue & listAll.SelectedItem.Value

But I'm getting data in the dr["Name"] field, not dr["ID"] filed.
How can I get the dr["ID"] value for the list box selected item?

Thank You.

Posted 1-Nov-12 22:00pm

Zukiari

Updated 1-Nov-12 22:59pm

AshishChaudha

v2

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Sanjay K. Gupta · Answer 1 · 2012-11-01T23:12:00

First your databind code is confusing. It may be like below
l

C#

SqlCommand cmd = new SqlCommand("select ID,Name from Machine_Area", con);
DataTable dt=new DataTable();
con.Open()
using(con)
{
 dt.Load(cmd.ExecuteReader());
}
listAll.DataSource=dt;
listAll.DataTextField = dr["Name"].ToString();
listAll.DataValueField = dr["ID"].ToString();

then you can get the listAll SelectedValue as

C#

DataRowView drv=(DataRowView)listAll.SelectedItem;
int selectedVal=Convert.ToInt32(drv["ID"]);
string selectedText=drv["Name"].ToString();