GridView CellValidating event fires more than once

[kh Wpl]

Hi Everyone,

I have a problem with CellValidating event.

GridView CellValidating event fires more than once when  NewRowEnterKeyMode property sets  to RadGridViewNewRowEnterKeyMode.EnterMovesToNextCell.
 
I have messagebox in CellValidating event to check the value could not be empty. 
when I try press enter key to leave cell, CellValidating event fires Twice. While there is a need a time validate. as a result messgebox shown Twice

please pay attention only when

1. NewRowEnterKeyMode sets  to RadGridViewNewRowEnterKeyMode.EnterMovesToNextCell
2. Press Enter Key to move next cell ( Tab Key behavior is great)


I am very grateful everyone help me.
Thank You.

[kh Wpl]

For Example in this sample : (click on new add row , on first column without input any data press enter to try leave column)


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Telerik.WinControls.UI;
using System.Collections;

namespace Example
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            radGridView1.AutoGenerateColumns = false;
            radGridView1.TableElement.RowHeight = 30;
            radGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
            radGridView1.AddNewRowPosition = SystemRowPosition.Bottom;
            radGridView1.EnterKeyMode = RadGridViewEnterKeyMode.EnterMovesToNextCell;
            radGridView1.NewRowEnterKeyMode = RadGridViewNewRowEnterKeyMode.EnterMovesToNextCell;
            radGridView1.BeginEditMode = Telerik.WinControls.RadGridViewBeginEditMode.BeginEditOnKeystrokeOrF2;
            radGridView1.EnableGrouping = false;
            radGridView1.EnableAlternatingRowColor = true;
            radGridView1.AllowAddNewRow = true;
            radGridView1.AllowEditRow = true;
            radGridView1.AllowDeleteRow = true;
            radGridView1.EnableFiltering = true;
            radGridView1.EnableSorting = true;

            ArrayList arrayList = new ArrayList();

            arrayList.Add(new Person() { Name = "Jack", Family = "J..." });
            arrayList.Add(new Person() { Name = "Bob", Family = "B..." });
            arrayList.Add(new Person() { Name = "Dani", Family = "D..." });

            radGridView1.Columns.Add("ColName", "Name","Name");
            radGridView1.Columns.Add("ColFamily", "Family", "Family");

            radGridView1.DataSource = arrayList;
        }

        private void radGridView1_CellValidating(object sender, CellValidatingEventArgs e)
        {
             GridViewDataColumn column = e.Column as GridViewDataColumn;
             if ((e.Row is GridViewDataRowInfo || e.Row is GridViewNewRowInfo) && column != null 

&& (column.Name == "ColName"))
             {
                 if (e.Value == null || ((string)e.Value).Trim() == "") if (string.IsNullOrEmpty

((string)e.Value) || ((string)e.Value).Trim() == string.Empty || string.IsNullOrWhiteSpace

((string)e.Value))
                     {
                         if (e.ActiveEditor != null)
                         {
                             MessageBox.Show("Please enter your name");
                             e.Cancel = true;
                         }
                     }
             }
        }

    }

    public class Person
    {

        private string name;
        private string family;

        public string Name
        {
            get { return name; }
            set { name = value; }
        }

        public string Family
        {
            get { return family; }
            set { family = value; }
        }
    }
}

[George]

Hello,

Thank you for contacting us.

I was able to reproduce the issue you are describing. I have logged it in our Public Issue Tracking System. You can find it here - PITS Issue. Feel free to add your comment/vote and subscribe for changes.

For the time being, you can use the following grid behavior as a workaround:

public class MyGridRowBehavior : GridNewRowBehavior
{
    protected override bool ProcessEnterKey(KeyEventArgs keys)
    {
        GridViewNewRowInfo newRowInfo = (GridViewNewRowInfo)this.GridViewElement.CurrentRow;

        if (this.GridViewElement.NewRowEnterKeyMode == RadGridViewNewRowEnterKeyMode.EnterMovesToNextCell)
        {
            bool editorClosed = !this.IsInEditMode;
            if (this.IsInEditMode)
            {
                if (this.IsOnLastCell())
                {
                    if (newRowInfo != null)
                    {
                        newRowInfo.GetType().GetMethod("DeferUserAddedRow", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).Invoke(newRowInfo, null);
                    }

                    editorClosed = GridViewElement.EndEdit();
                }
                else
                {
                    editorClosed = GridViewElement.CloseEditor();
                }
            }

            if (editorClosed)
            {
                this.Navigator.SelectNextColumn();
                this.GridViewElement.BeginEdit();
            }

            if (this.IsInEditMode && this.GridViewElement.CurrentRow is GridViewNewRowInfo &&
                this.GridViewElement.BeginEditMode != RadGridViewBeginEditMode.BeginEditProgrammatically)
            {
                return this.GridViewElement.BeginEdit();
            }

            if (newRowInfo != null)
            {
                newRowInfo.GetType().GetMethod("RaiseUserAddedRow", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).Invoke(newRowInfo, null);
            }

            return false;
        }

        return base.ProcessEnterKey(keys);
    }
}

You can register it as follows:

((BaseGridBehavior)this.radGridView1.GridBehavior).UnregisterBehavior(typeof(GridViewNewRowInfo));
((BaseGridBehavior)this.radGridView1.GridBehavior).RegisterBehavior(typeof(GridViewNewRowInfo), new MyGridRowBehavior());

I have also updated your Telerik Points for the report.

I hope this helps.
 
Regards,
George
Telerik