Check All Checkbox In GridView To Bulk Edit Or Update ASP.NET C# VB.NET

In this example i am going to describe how to implement CheckAll CheckBox in GridView to check all the rows in gridView.

For this i have put a checkBox in header Template of gridview which on checking will check all the rows in gridview using server side code.

Html Source of gridView :

<asp:GridView ID="GridView1" runat="server" 
              DataSourceID="SqlDataSource1" 
              AutoGenerateColumns="false" 
              CellPadding="2" ForeColor="#333333" 
              GridLines="Both" 
              DataKeyNames="ID" 
              OnRowDataBound="GridView1_RowDataBound">
<Columns>
<asp:TemplateField HeaderText="CheckAll">
<HeaderTemplate>
<asp:CheckBox ID="chkSelectAll" runat="server" 
              AutoPostBack="true" 
              OnCheckedChanged="chkSelectAll_CheckedChanged"/>
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" 
              AutoPostBack="true" 
              OnCheckedChanged="chkSelect_CheckedChanged"/>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="ID" HeaderText="ID" 
                SortExpression="ID"/>
<asp:TemplateField HeaderText="Name" SortExpression="Name">
<ItemTemplate>
<asp:TextBox ID="txtName" runat="server" 
             Text='<%# Bind("Name") %>' ForeColor="Blue" 
             BorderStyle="none" BorderWidth="0px" 
             ReadOnly="true" >
</asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Location" SortExpression
="Location">
<ItemTemplate>
<asp:TextBox ID="txtLocation" runat="server" 
             Text='<%# Bind("Location") %>' 
             ForeColor="Blue" BorderStyle="none" 
             ReadOnly="true">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT [ID], [Name], [Location] FROM [Details]" 
DeleteCommand="DELETE FROM Details WHERE (ID = @ID)" 
UpdateCommand="UPDATE [Details] SET [Name] = @Name, 
               [Location] = @Location WHERE [ID] = @ID">
<DeleteParameters>
<asp:Parameter Name="ID" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="Name" />
<asp:Parameter Name="Location" />
<asp:Parameter Name="ID" />
</UpdateParameters>
</asp:SqlDataSource>
<asp:Button ID="btnUpdate" runat="server" 
            OnClick="btnUpdate_Click" Text="Update" />
<asp:Button ID="btnDelete" runat="server" 
            OnClick="btnDelete_Click" 
            Text="Delete" /> 

C# Code behind :

protected void chkSelectAll_CheckedChanged
                               (object sender, EventArgs e)
{
 CheckBox chkAll = 
    (CheckBox)GridView1.HeaderRow.FindControl("chkSelectAll");
 if (chkAll.Checked == true)
 {
   foreach (GridViewRow gvRow in GridView1.Rows)
   {
    CheckBox chkSel = 
         (CheckBox)gvRow.FindControl("chkSelect");
    chkSel.Checked = true;
    TextBox txtname = (TextBox)gvRow.FindControl("txtName");
    TextBox txtlocation = (TextBox)gvRow.FindControl("txtLocation");
    txtname.ReadOnly = false;
    txtlocation.ReadOnly = false;
    txtname.ForeColor = System.Drawing.Color.Black;
    txtlocation.ForeColor = System.Drawing.Color.Black;
   }
 }
 else
 {
  foreach (GridViewRow gvRow in GridView1.Rows)
  {
   CheckBox chkSel = (CheckBox)gvRow.FindControl("chkSelect");
   chkSel.Checked = false;
   TextBox txtname = (TextBox)gvRow.FindControl("txtName");
   TextBox txtlocation = (TextBox)gvRow.FindControl("txtLocation");
   txtname.ReadOnly = true;
   txtlocation.ReadOnly = true;
   txtname.ForeColor = System.Drawing.Color.Blue;
   txtlocation.ForeColor = System.Drawing.Color.Blue;
   }
  }
}

VB.NET code behind :

Protected Sub chkSelectAll_CheckedChanged(ByVal sender As Object, ByVal e As EventArgs)
    Dim chkAll As CheckBox = DirectCast(GridView1.HeaderRow.FindControl("chkSelectAll"), CheckBox)
    If chkAll.Checked = True Then
        For Each gvRow As GridViewRow In GridView1.Rows
            Dim chkSel As CheckBox = DirectCast(gvRow.FindControl("chkSelect"), CheckBox)
            chkSel.Checked = True
            Dim txtname As TextBox = DirectCast(gvRow.FindControl("txtName"), TextBox)
            Dim txtlocation As TextBox = DirectCast(gvRow.FindControl("txtLocation"), TextBox)
            txtname.[ReadOnly] = False
            txtlocation.[ReadOnly] = False
            txtname.ForeColor = System.Drawing.Color.Black
            txtlocation.ForeColor = System.Drawing.Color.Black
        Next
    Else
        For Each gvRow As GridViewRow In GridView1.Rows
            Dim chkSel As CheckBox = DirectCast(gvRow.FindControl("chkSelect"), CheckBox)
            chkSel.Checked = False
            Dim txtname As TextBox = DirectCast(gvRow.FindControl("txtName"), TextBox)
            Dim txtlocation As TextBox = DirectCast(gvRow.FindControl("txtLocation"), TextBox)
            txtname.[ReadOnly] = True
            txtlocation.[ReadOnly] = True
            txtname.ForeColor = System.Drawing.Color.Blue
            txtlocation.ForeColor = System.Drawing.Color.Blue
        Next
    End If
End Sub

How to get string array specific index position value in asp.net

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    private string[] controls = { "ListView", "GridView", "DetailsView", "FormView", "LinqDataSource", "EntityDataSource" };
    protected void Page_Load(object sender, System.EventArgs e) {
        if(!this.IsPostBack)
        {
            Label1.Text = "String array created successfully!<br />Array elements:<br /><br />";
            foreach (string element in controls)
            {
                Label1.Text += element + "<br />";
            }
        }
    }
    protected void Button1_Click(object sender, System.EventArgs e)
    {
        Label2.Text = "Array [2] Index Value: " + controls[2];
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>How to get string array specific index position value in asp.net</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Green">asp.net array example:<br />String Array Specific Index Positin Value</h2>
        <asp:Label
             ID="Label1"
             runat="server"
             Font-Size="Large"
             ForeColor="HotPink"
             Font-Bold="true"
             Font-Italic="true"
             >
        </asp:Label>
        <br />
        <asp:Label
             ID="Label2"
             runat="server"
             Font-Size="Large"
             ForeColor="DodgerBlue"
             Font-Bold="true"
             Font-Italic="true"
             >
        </asp:Label>
        <br /><br />
        <asp:Button
             ID="Button1"
             runat="server"
             OnClick="Button1_Click"
             Font-Bold="true"
             Text="Get Array [2] Value"
             ForeColor="SeaGreen"
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</body>
</html>

How to get (search, find) array index position by array element value in asp.net(Array.IndexOf)

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    private string[] controls = { "SqlDataSource", "AccessDataSource", "ObjectDataSource", "XmlDataSource", "LinqDataSource", "EntityDataSource", "SiteMapDataSource" };
    protected void Page_Load(object sender, System.EventArgs e) {
        if(!this.IsPostBack)
        {
            Label1.Text = "String array created successfully!<br />Array elements:<br /><br />";
            foreach (string element in controls)
            {
                Label1.Text += element + "<br />";
            }
        }
    }
    protected void Button1_Click(object sender, System.EventArgs e)
    {
        int indexOf = Array.IndexOf(controls, "LinqDataSource");
        Label2.Text ="We Find [LinqDataSource] At the index position: " + indexOf.ToString();
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>How to get (search, find) array index position by array element value in asp.net(Array.IndexOf)</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Red">asp.net Array.IndexOf() example:<br />Search Array Index Number By Element Value</h2>
        <asp:Label
             ID="Label1"
             runat="server"
             Font-Size="Large"
             ForeColor="SeaGreen"
             Font-Bold="true"
             Font-Italic="true"
             >
        </asp:Label>
        <br />
        <asp:Label
             ID="Label2"
             runat="server"
             Font-Size="Large"
             ForeColor="DodgerBlue"
             Font-Bold="true"
             Font-Italic="true"
             >
        </asp:Label>
        <br /><br />
        <asp:Button
             ID="Button1"
             runat="server"
             OnClick="Button1_Click"
             Font-Bold="true"
             Text="Search Array [LinqDataSource] Index Position"
             ForeColor="SeaGreen"
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    </div>
    </form>
</body>
</html>

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<%@ Page Language="C#" %>
<%@ Import Namespace="System.Net" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    protected void Page_Load(object sender, System.EventArgs e) {
        HttpCookie cookie = new HttpCookie("ColorCookie");
        cookie["Color"] = "Crimson";
        cookie["ColorValue"] = "#DC143C";
        cookie.Expires = DateTime.Now.AddYears(1);
        Response.Cookies.Add(cookie);
        Label1.Text = "Cookie created successfully and set expire after 1 year";
        HttpCookie myCookie = Request.Cookies["ColorCookie"];
        if (myCookie != null)
        {
            string color = myCookie["Color"];
            string colorValue = myCookie["ColorValue"];
            Label1.Text += "<br /><br />Cookie[ColorCookie] Found and read<br/>";
            Label1.Text += "Color: " + color;
            Label1.Text += "<br />Value: " + colorValue;
        }
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>asp.net cookie example: how to set expires date time</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Teal">asp.net Cookie example: set cookie expires</h2>
        <asp:Label
            ID="Label1"
            runat="server"
            Font-Size="Large"
            ForeColor="Crimson"
            Font-Italic="true"
            Font-Bold="true"
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<%@ Page Language="C#" %>
<%@ Import Namespace="System.Net" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    protected void page_Load(object sender, System.EventArgs e) {
        HttpCookie favoriteColor = Request.Cookies["FavoriteColor"];
        if (favoriteColor == null)
        {
            HttpCookie userCookie = new HttpCookie("FavoriteColor");
            userCookie["Name"] = "Jones";
            userCookie["Color"] = "Crimson";
            userCookie.Expires = DateTime.Now.AddDays(1);
            Response.Cookies.Add(userCookie);
            Label1.Text = "Cookie created at: " + DateTime.Now.ToString()+ "<br /><br />";
           
        }
        else
        {
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            string color = favoriteColor["Color"];
            Label1.Text += "Cookie found and read<br />";
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</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>asp.net cookie example: how to use cookie in asp.net</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <h2 style="color:Navy">asp.net cookie: how to use</h2>
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