HOW DO I CHECK AND UNCHECK CHECKBOX IN ASP.NET

Question

Hi team can someone help me on how i should check or uncheck checkbox in c# using asp.net. Regard George

Senthilkumar · Answer

At the same time you can do it in the server side. But of you use the update panel then it will be good because avoiding the page refresh and safety execution in the server side. You can do it like this. bool isCheck = false; if(chkHeader.Checked) { isCheck = true; } for(int i=0;i { GridViewRow gv = gridview1.Rows[0]; CheckBox chk = (CheckBox) gv.FindControl(chkRow); if(isCheck) { chk.Checked = true; } else { chk.Checked = false; } } Hope this will help you how to do it in server side.

Satyapriya Nayak · Answer

Hi George Select Deselect all checkbox in gridview Default.aspx code Untitled Page function Selectall_Deselectall(CheckBoxControl) { if (CheckBoxControl.checked == true) { var i; for (i=0; i { if ((document.forms[0].elements[i].type == 'checkbox') && (document.forms[0].elements[i].name.indexOf('checkpoint') > -1)) { document.forms[0].elements[i].checked = true; } } } else { var i; for (i=0; i { if ((document.forms[0].elements[i].type == 'checkbox') && (document.forms[0].elements[i].name.indexOf('checkpoint') > -1)) { document.forms[0].elements[i].checked = false; } } } } Default.aspx.vb code Imports System.Data.SqlClient Imports System.Data Partial Class _Default Inherits System.Web.UI.Page Dim strConnString As String = System.Configuration.ConfigurationManager.ConnectionStrings.Item(ConnectionString).ToString() Dim con As New SqlConnection(strConnString) Dim str As String Dim com As SqlCommand Dim sqlda As SqlDataAdapter Dim ds As DataSet Protected Sub Page_Load(ByVal sender As Object ByVal e As System.EventArgs) Handles Me.Load con.Open() str = select * from student com = New SqlCommand(Str con) Dim reader As SqlDataReader reader = com.ExecuteReader() GridView1.DataSource = reader GridView1.DataBind() con.Close() End Sub End Class Also refer http://www.c-sharpcorner.com/uploadfile/krishnasarala/checkuncheck-all-checkboxes-in-Asp-Net-gridview/default.aspx Thanks If this post helps you mark it as answer

Sean Stewart · Answer

http://www.dotnetcurry.com/ShowArticle.aspx?ID=77