Check/Uncheck All Checkboxes in Asp.Net Gridview


In this article we will see how to check and uncheck all CheckBoxes present in an ASP.Net GridView control.


While programming many times we need to use a CheckBox control in an ASP.Net GridView for allowing selection of a particular row of a GridView. In some cases a GridView can contain 100 of records and if the user wants to select all rows of the GridView then selecting each row one by one is very tedious and a time-consuming job. To make it easier we will see how to write a simple method for selecting all CheckBoxes in a GridView. Take a look at the following snippets.

  1. Create a new website. On the default.aspx page keep the GridView control with AutogeneratedColumn = false. The source for the GridView should look like below.

    asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
            <asp:TemplateField ShowHeader="false">
           <asp:CheckBox ID="chkid" runat="server" />
            <asp:BoundField DataField="Auth_Name" HeaderText="Author Name" />
            <asp:BoundField DataField="Auth_Loc" HeaderText="Location" />
  2. Keep two buttons on the form; one for checking all checkboxes and the other for unchecking.
  3. The CheckState method is for performing a check/uncheck operation in the GridView. This method will take true/false as input to check/uncheck the checkboxes of the GridView.

    private void CheckState(bool p)

            foreach (GridViewRow row in GridView1.Rows)
               CheckBox chkcheck = (CheckBox)row.FindControl("chkid");
                     chkcheck.Checked = p;

  4. Bind your GridView and run.


By using a simple method we are able to check/uncheck 100 of rows also in GridView.