Edit multiple records in a grid view

Satyapriyanayak
Posted by Satyapriyanayak under ASP.NET category on | Points: 40 | Views : 1162
We will know how to edit multiple records in a gridview. 

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Editable_GridView_multiple_records._Default" %>
<head runat="server">
</head>
<body>
<form id="form1" runat="server">
<div><asp:GridView ID="GridView1" runat="server" AllowPaging="True" DataSourceID="SqlDataSource1" AutoGenerateColumns="false">
<Columns><asp:TemplateField HeaderText="Select">
<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") %>' ReadOnly="true" ForeColor="Blue" BorderStyle="none" BorderWidth="0px" >
</asp:TextBox></ItemTemplate> </asp:TemplateField>
<asp:TemplateField HeaderText="Location" SortExpression="Location"> <ItemTemplate>
<asp:TextBox ID="txtLocation" runat="server" Text='<%# Bind("Location") %>' ReadOnly="true" ForeColor="Blue"
BorderStyle="none" BorderWidth="0px"></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><br />
<asp:Button ID="btnUpdate" runat="server" OnClick="btnUpdate_Click" Text="Update" /><br />
</div><asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Check all" />
<asp:Button ID="Button2" runat="server" onclick="Button2_Click" Text="UnCheck all" />
</form></body></html>

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Text;
namespace Editable_GridView_multiple_records
{
public partial class _Default : System.Web.UI.Page
{
string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
protected void btnUpdate_Click(object sender, EventArgs e)
{
StringBuilder strSql = new StringBuilder(string.Empty);
SqlConnection con = new SqlConnection(connStr);
SqlCommand cmd = new SqlCommand();
for (int i = 0; i < GridView1.Rows.Count; i++)
{
CheckBox chkUpdate = (CheckBox)
GridView1.Rows[i].Cells[0].FindControl("chkSelect");
if (chkUpdate != null)
{
if (chkUpdate.Checked)
{
string strID = GridView1.Rows[i].Cells[1].Text;
string strName = ((TextBox)
GridView1.Rows[i].FindControl("txtName")).Text;
string strLocation = ((TextBox)
GridView1.Rows[i].FindControl("txtLocation")).Text;
string strUpdate =
"Update Details set Name = '" + strName + "',Location = '" + strLocation + "' WHERE ID ='" + strID + "'";
strSql.Append(strUpdate);
}
}
}
try
{
cmd.CommandType = CommandType.Text;
cmd.CommandText = strSql.ToString();
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
}
catch (SqlException ex)
{
string errorMsg = "Error in Updation";
errorMsg += ex.Message;
throw new Exception(errorMsg);
}
finally
{
con.Close();
}
UncheckAll();
}
private void UncheckAll()
{
foreach (GridViewRow row in GridView1.Rows)
{
CheckBox chkUncheck = (CheckBox)row.FindControl("chkSelect");
TextBox txtname = (TextBox)row.FindControl("txtName");
TextBox txtlocation = (TextBox)row.FindControl("txtLocation");
chkUncheck.Checked = false;
txtname.ReadOnly = true;
txtlocation.ReadOnly = true;
txtname.ForeColor = System.Drawing.Color.Blue;
txtlocation.ForeColor = System.Drawing.Color.Blue;
}
}
protected void chkSelect_CheckedChanged (object sender, EventArgs e)
{
CheckBox chkTest = (CheckBox)sender;
GridViewRow grdRow = (GridViewRow)chkTest.NamingContainer;
TextBox txtname = (TextBox)grdRow.FindControl ("txtName");
TextBox txtlocation = (TextBox)grdRow.FindControl ("txtLocation");
if (chkTest.Checked)
{
txtname.ReadOnly = false;
txtlocation.ReadOnly = false;
txtname.ForeColor = System.Drawing.Color.Black;
txtlocation.ForeColor = System.Drawing.Color.Black;
}
else
{
txtname.ReadOnly = true;
txtlocation.ReadOnly = true;
txtname.ForeColor = System.Drawing.Color.Blue;
txtlocation.ForeColor = System.Drawing.Color.Blue;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
CheckState(true);
}
protected void Button2_Click(object sender, EventArgs e)
{
CheckState(false);
}
private void CheckState(bool p)
{
foreach (GridViewRow row in GridView1.Rows)
{
CheckBox chkcheck = (CheckBox)row.FindControl("chkSelect");
chkcheck.Checked = p;
}
}
}
}

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