Solved

Delete Row from Data Grid

Posted on 2010-09-20
7
449 Views
Last Modified: 2012-06-22
I need to be able to delete rows from a data grid, however if I add any columns and buttons to the form it throws up errors. (Sample code and errors attached.)

Thanks.
<%@ Page Language="C#" src="SearchUser.aspx.cs" AutoEventWireup="true" Inherits="Article15.SDisplay" ContentType="text/html" ResponseEncoding="iso-8859-1" %>
.
.
.
 <form id="Form1" method="post" runat="server">
      
		 <asp:GridView ID="GridView1" runat="server" BackColor="#dddddd"
            BorderColor="black" BorderStyle="Solid" Width="1200px" BorderWidth="5px" DataKeyNames="uid"
             EmptyDataText="Empty..." Font-Names="Verdana"
            Font-Size="Small" GridLines="None">
	        </asp:GridView>
	</form>
.
.
.
	
namespace Article15
{
  using System;
  using System.Collections;
  using System.ComponentModel;
  using System.Data;
  using System.Data.SqlClient;  
  using System.Web;
  using System.Web.SessionState;
  using System.Web.UI;
  using System.Web.UI.WebControls;
  using System.Web.UI.HtmlControls;
  using System.Web.UI.WebControls.WebParts;
  using System.Configuration;


  public class SDisplay : System.Web.UI.Page
  {
	
	protected void Page_Load(Object s, EventArgs e)
	{	

		SQLFunction();
  	}
	public void SQLFunction() 
	{
		SqlConnection myConnection = new SqlConnection(ConfigurationManager.ConnectionStrings["CONNECTSTR"].ConnectionString);
		myConnection.Open();
		SqlCommand oCom = new SqlCommand();
		oCom.Connection = myConnection;
		oCom.CommandText = "dbo247722972.sp_UserSearch";
		oCom.CommandType = CommandType.StoredProcedure;
		oCom.Parameters.Add(
		new SqlParameter("@surname", "Smith"));

    		SqlDataAdapter adapter = new SqlDataAdapter(oCom);
            	DataSet ds = new DataSet();

            	adapter.Fill(ds, "sqltable");

            	GridView1.DataSource = ds;
            	GridView1.DataBind();      
            	myConnection.Close();

	}
	
	}
}

Open in new window

Parser Error Message: System.Web.UI.WebControls.DataControlFieldCollection must have items of type 'System.Web.UI.WebControls.DataControlField'. 'asp:ButtonColumn' is of type 'System.Web.UI.WebControls.ButtonColumn'.

Source Error: 


Line 27: 			<columns>
Line 28: 			<asp:ButtonColumn Text="Delete" CommandName="Delete"  ButtonType="pushButton" />
Line 29: 			</columns>
Line 30: 	        </asp:GridView>

Open in new window

0
Comment
Question by:kirkheaton25
7 Comments
 
LVL 35

Expert Comment

by:YZlat
ID: 33717414
use this
<asp:GridView ID="GridView3" runat="server" BackColor="#dddddd"

            BorderColor="black" BorderStyle="Solid" Width="1200px" BorderWidth="5px" DataKeyNames="uid"

             EmptyDataText="Empty..." Font-Names="Verdana"

            Font-Size="Small" GridLines="None">

            <Columns>

            <asp:CommandField ShowEditButton="True" ShowDeleteButton="True" />

            </Columns>

Open in new window

0
 
LVL 5

Expert Comment

by:FredTang
ID: 33717428
I think the button type is error,please remove the button type.
<asp:ButtonColumn   HeaderText="Delete" Text= "Del"     CommandName= "Delete" ></asp:ButtonColumn>
0
 
LVL 41

Expert Comment

by:guru_sami
ID: 33717462
you should add ButtonField like this:
 <asp:ButtonField Text="Delete" CommandName="Delete" ButtonType="Button" />

You can also set GV property AutoGenerateDeleteButton="true if you don't want to do above.
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 35

Expert Comment

by:YZlat
ID: 33717493
0
 
LVL 35

Accepted Solution

by:
YZlat earned 500 total points
ID: 33717504
0
 
LVL 1

Author Comment

by:kirkheaton25
ID: 33717912
Thanks, I added:
<asp:commandfield showdeletebutton="true"
            deletetext="Remove"..
and added the OnRowDeleting="Documents_Delete" to the grid but I am now getting "fired event RowDeleting which wasn't handled." errors whenever I click on a Remove link.

The code behind is below.

      protected void Documents_Delete(object sender, GridViewDeleteEventArgs e)
      {
       // Do something
      }

0
 
LVL 1

Author Closing Comment

by:kirkheaton25
ID: 33717933
Thanks for your help. I've now got it working.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction This article shows how to use the open source plupload control to upload multiple images. The images are resized on the client side before uploading and the upload is done in chunks. Background I had to provide a way for user…
Entity Framework is a powerful tool to help you interact with the DataBase but still doesn't help much when we have a Stored Procedure that returns more than one resultset. The solution takes some of out-of-the-box thinking; read on!
Hi friends,  in this video  I'll show you how new windows 10 user can learn the using of windows 10. Thank you.
Learn how to create flexible layouts using relative units in CSS.  New relative units added in CSS3 include vw(viewports width), vh(viewports height), vmin(minimum of viewports height and width), and vmax (maximum of viewports height and width).

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now