Question

I have a checkbox that is databound to a field in my database and that field is a bit in the database.

This is my Checkbox:

<asp:CheckBox ID="chkDownloaded" runat="server" Checked='<%#DataBinder.Eval(Container.DataItem, "Downloaded")%>' />

When I run the code I get the following error:

Specified cast is not valid.

Any idea how to fix this?

Thanks!

Answer 1

Option #1

Your request to Database should be like below….

Select Cast(IsNull(Downloaded, 0) as bit) as Downloaded From TableName

Option #2

In the Business Logic Layer Convert the Downloaded value to false in case of Null.

Option #3

protected void GridView_RowDataBound(object sender, System.Web.UI.WebControls.GridViewRowEventArgs e)
{
    CheckBox c = e.Row.FindControl("chkDownloaded");
    (((YourClassName)e.Row.DataItem).YourPropertyName) == null ? false : ((YourClassName)e.Row.DataItem).YourPropertyName;
}