How To Delete multiple rows from GridView with Checkbox Selection in Asp.net

       

Description:-

           

In this example I will explain that how to delete multiple rows or records in GridView based on CheckBox selection and with displaying confirmation message box before deleting rows in ASP.Net.

In which I have added a template field with checkboxes with each and every rows of gridview and  also I have added a check all checkbox in the Header Template of the ASP.net GridView Control. When user check the header checkbox the all rows’s checkbox  will be automatically checked.

This  is nothing but a It is one kind of Facility that for example suppose you have Delete 100  Record  or All Record in Gridview at that this Example is very useful Because you can Select All Record through Checkbox and press delete Button the all Record are Deleted successfully otherwise you have to Delete Record one by one and it is very time consuming process so that this Facility is very useful.

In this Example we provide Facility to user just Checkmark on the Header Checkbox the All Record that are Display in Gridview are Checked. And when Uncheckmark the Header Checkbox All Record that are Display on Gridview are Unchecked.

You can also Delete Selected Record for example suppose Gridview contains 100 Record and we want to delete a  5 and 25 and 35 number Record so it is possible through this Example. 

GridView Code:-

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"

    BackColor="White" BorderColor="#336699" BorderStyle="Solid" BorderWidth="1px" 

    CellPadding="0" DataKeyNames="id" Font-Size="10pt"

    Font-Names="Arial" GridLines="Vertical" Width="40%">

          

            <Columns>           

                <asp:TemplateField>

                    <ItemTemplate>

                        <asp:CheckBox ID="chkStatus" runat="server"

                            AutoPostBack="true" />

                    </ItemTemplate>                  

                </asp:TemplateField>

              

                <asp:BoundField DataField="RollNo" HeaderText="RollNo" />                  

                <asp:BoundField DataField="StudentName" HeaderText="StudentName"  />

            </Columns>

          

</asp:GridView>

<asp:button runat="server" text="Button" onClick="delclick" />

 


ClickEvent For Delete:-

protected void delclick(object sender, ImageClickEventArgs e)

    {

        foreach (GridViewRow grdRow in GridView1.Rows)

        {

            CheckBox c = (CheckBox)(GridView1.Rows[grdRow.RowIndex].Cells[0].FindControl("CheckBox1"));

            string a = GridView1.Rows[grdRow.RowIndex].Cells[1].Text;

            if (c.Checked)

            {

                string con = @"Data Source=SQLDB;Initial Catalog=Demo;User ID=Demod;Password=Demo1@";

                string q = "delete from bio where id = " + a.ToString();

                SqlConnection conn = new SqlConnection(con);

                SqlCommand cmd = new SqlCommand(q, conn);

                conn.Open();

                cmd.ExecuteNonQuery();

            }

        

        }

        grid();

    }

Bingrid Function:-

 protected void grid()

    {

     

        DataSet ds = new DataSet();

        string con = @"Data Source=SQLDB;Initial Catalog=Demo;User ID=Demod;Password=Demo1@";

        string q = "select * from bio";

        SqlConnection conn = new SqlConnection(con);

        SqlCommand cmd = new SqlCommand(q, conn);

        SqlDataAdapter sa = new SqlDataAdapter();

        conn.Open();

        cmd.ExecuteNonQuery();

        sa.SelectCommand = cmd;

        sa.Fill(ds);

        GridView1.DataSource = ds;

        GridView1.DataBind();

}