Drop Down List not displays age correctly in gridview

Instead Of This One

<asp:dropdownlist id="empAge" runat="server" width="100%" datatextfield="<%#Eval("age")%>" >

U Can Directly Use

<%#Eval("age")%>

So That Age Will Load for Each Employee

Here Is the Solution...

Change In ItemTemplate

DataSource='<%#Eval("age")%>'

To

DataTextField='<%#Eval("age")%>'

Like This...

<itemtemplate>
  <asp:dropdownlist id="empAge" runat="server" width="100%" 
        DataTextField='<%#Eval("age")%>'>  
</itemtemplate>

Hi,

Dropdown datasource should be as collection object or datatable.
Here you cant assign the column name as datasource.
Or you can call the one function from code behind which will return collection object.

Regards,
Kiran.

Hi.

I think you should bind your DropDownList to a proper datasource, not use DataSource='<%#Eval("age")%>'.

Maybe this will help (from MSDN[^]):

<asp:DropDownList id="ColorList"
     AutoPostBack="True"
     OnSelectedIndexChanged="Selection_Change"
     runat="server"/>

void Selection_Change(Object sender, EventArgs e)
{
   // Enter here what needs to happen when the dropdown selected item has been changed
}

But more importantly:

void Page_Load(Object sender, EventArgs e)
{

   // Load data for the DropDownList control only once, when the
   // page is first loaded.
   if(!IsPostBack)
   {

      // Specify the data source and field names for the Text
      // and Value properties of the items (ListItem objects)
      // in the DropDownList control.
      ColorList.DataSource = CreateDataSource();
      ColorList.DataTextField = "ColorTextField";
      ColorList.DataValueField = "ColorValueField";

      // Bind the data to the control.
      ColorList.DataBind();

      // Set the default selected item, if desired.
      ColorList.SelectedIndex = 0;

   }

}

And

ICollection CreateDataSource()
     {

        // Create a table to store data for the DropDownList control.
        DataTable dt = new DataTable();

        // Define the columns of the table.
        dt.Columns.Add(new DataColumn("ColorTextField", typeof(String)));
        dt.Columns.Add(new DataColumn("ColorValueField", typeof(String)));

        // Here you can read the values from the DataGrid or from the XML file
        // Populate the table with sample values.
        dt.Rows.Add(CreateRow("White", "White", dt));
        dt.Rows.Add(CreateRow("Silver", "Silver", dt));
        dt.Rows.Add(CreateRow("Dark Gray", "DarkGray", dt));
        dt.Rows.Add(CreateRow("Khaki", "Khaki", dt));
        dt.Rows.Add(CreateRow("Dark Khaki", "DarkKhaki", dt));

        // Create a DataView from the DataTable to act as the data source
        // for the DropDownList control.
        DataView dv = new DataView(dt);
        return dv;
     }

     DataRow CreateRow(String Text, String Value, DataTable dt)
     {
        // Create a DataRow using the DataTable defined in the
        // CreateDataSource method.
        DataRow dr = dt.NewRow();

        // This DataRow contains the ColorTextField and ColorValueField
        // fields, as defined in the CreateDataSource method. Set the
        // fields with the appropriate value. Remember that column 0
        // is defined as ColorTextField, and column 1 is defined as
        // ColorValueField.
        dr[0] = Text;
        dr[1] = Value;

        return dr;
     }

In CreateDataSource() you can read the values from file or the DataGrid and assign them to a datasource.