Checkbox bind even if null (datatable control)

Question

I need to bind my checkbox somewhere even if it's null so I won't get an error about invalid casting.

            DataTable dt = new DataTable();
            dt.Columns.Add("Name");
            dt.Columns.Add("DeleteFlag", typeof(bool));

In ASP:

    <asp:CheckBox ID="MyCheckBox" runat="server" Checked='<%# Bind("DeleteFlag") %>'
                    Enabled="False"/>

(If I remove this code, it works, but no checkbox visible ofc.) Maybe instantiate it with a value set to it already (true , false)

Can anyone help please? Will reply in comment if needed.

Ashwini Verma · Accepted Answer · 2014-02-24 06:39:25Z

6

use bool.Parse().

   <asp:CheckBox ID="MyCheckBox" runat="server"
Checked='<%#bool.Parse(Eval("DeleteFlag").ToString())%>'
                        Enabled="False"/>

Or this is what you are looking for:

Checked='<%# Eval("DeleteFlag") == DBNull.Value ? false :  Eval("DeleteFlag") %>'

answered Feb 24, 2014 at 6:39

Ashwini Verma

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