manipulating drop-downs in template column of datagrid

Code snippet for demonstration of manipulating drop-downs in template column of datagrid:

Copy the following between the

tags of the aspx page in HTML view.























Copy the following in the Page_Load method in code-behind or

between the tags



private void Page_Load(object sender, System.EventArgs e)

{

DataTable dt = new DataTable();

DataRow dr;

DropDownList ddl;

int i;



//Create the datasource for the datagrid

dt.Columns.Add("col1", Type.GetType("System.String"));

for(i = 0; i < 5; i++)

{

dr = dt.NewRow();

dr[0] = i.ToString();

dt.Rows.Add(dr);

}



//bind datasource to the datagrid

dgtest.DataSource = dt;

dgtest.DataBind();



//manipulate the drop-down list of each row of the datagrid.

//this code simply displays the ID as the sole element of the drop-down.

for(i = 0; i < dgtest.Items.Count; i++)

{

ddl = (DropDownList)dgtest.Items[i].FindControl("ddltest");



if(ddl != null)

{

ddl.Items.Clear();

ddl.Items.Add(i.ToString());

}

}

}



output:

ID ¦

-------------------

0 ¦ | 0 |v|

1 ¦ | 1 |v|

2 ¦ | 2 |v|

3 ¦ | 3 |v|

4 ¦ | 4 |v|