GridView CellValueChanged event not calling

[Zerka]

Hi,

I am facing a strange problem. Can you please help about it?

Scenario
Actually, On my RadForm, I am opening another RAdForm. This second form has a RAdGridView. Whenever user closes this second form, it is programmmatically hided but not closed. The grid on the second form has just one row in which user can enter values.

Problem:
User opens the second form and enter some values in the grid and then closes the form(Acually hiding). Then user again open that second form, the value that user eneterd are still there. That is correct. I want so. But the problem is user can not now change the values in the grid. Somehow CellValueChanged event is not calling. And if it calls once then second time it is not calling. Why is it so?

Sorry for my bad english. Any help would be appreciated.

Thanks

[Richard Slade]

Hello Michael,

I have tried this and I haven't been able to replicate your issue.
I've prepared a small exmaple for you.

Form1 Designer

namespace RadControlsWinFormsApp1
{
    partial class Form1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.radButton1 = new Telerik.WinControls.UI.RadButton();
            ((System.ComponentModel.ISupportInitialize)(this.radButton1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
            this.SuspendLayout();
            //
            // radButton1
            //
            this.radButton1.Location = new System.Drawing.Point(89, 107);
            this.radButton1.Name = "radButton1";
            this.radButton1.Size = new System.Drawing.Size(130, 24);
            this.radButton1.TabIndex = 0;
            this.radButton1.Text = "radButton1";
            this.radButton1.Click += new System.EventHandler(this.radButton1_Click);
            //
            // Form1
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(298, 279);
            this.Controls.Add(this.radButton1);
            this.Name = "Form1";
            //
            //
            //
            this.RootElement.ApplyShapeToControl = true;
            this.Text = "Form1";
            this.ThemeName = "ControlDefault";
            ((System.ComponentModel.ISupportInitialize)(this.radButton1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private Telerik.WinControls.UI.RadButton radButton1;
    }
}

Form1.cs

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

namespace RadControlsWinFormsApp1
{
    public partial class Form1 : Telerik.WinControls.UI.RadForm
    {
        private Form2 form2;

        public Form1()
        {
            InitializeComponent();
        }

        private void radButton1_Click(object sender, EventArgs e)
        {
            if (form2 == null)
            {
                form2 = new Form2();
                form2.Show();
            }
            else
            {
                form2.Show();
            }
        }
    }
}

Form2 Designer

namespace RadControlsWinFormsApp1
{
    partial class Form2
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.radGridView1 = new Telerik.WinControls.UI.RadGridView();
            this.radButton1 = new Telerik.WinControls.UI.RadButton();
            this.radButton2 = new Telerik.WinControls.UI.RadButton();
            ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.radButton1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.radButton2)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
            this.SuspendLayout();
            //
            // radGridView1
            //
            this.radGridView1.Location = new System.Drawing.Point(2, 1);
            this.radGridView1.Name = "radGridView1";
            this.radGridView1.Size = new System.Drawing.Size(295, 218);
            this.radGridView1.TabIndex = 0;
            this.radGridView1.Text = "radGridView1";
            this.radGridView1.CellValueChanged += new Telerik.WinControls.UI.GridViewCellEventHandler(this.radGridView1_CellValueChanged);
            //
            // radButton1
            //
            this.radButton1.Location = new System.Drawing.Point(156, 234);
            this.radButton1.Name = "radButton1";
            this.radButton1.Size = new System.Drawing.Size(130, 24);
            this.radButton1.TabIndex = 1;
            this.radButton1.Text = "Edit Record";
            this.radButton1.Click += new System.EventHandler(this.radButton1_Click);
            //
            // radButton2
            //
            this.radButton2.Location = new System.Drawing.Point(2, 234);
            this.radButton2.Name = "radButton2";
            this.radButton2.Size = new System.Drawing.Size(130, 24);
            this.radButton2.TabIndex = 2;
            this.radButton2.Text = "Hide Form";
            this.radButton2.Click += new System.EventHandler(this.radButton2_Click);
            //
            // Form2
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(298, 279);
            this.Controls.Add(this.radButton2);
            this.Controls.Add(this.radButton1);
            this.Controls.Add(this.radGridView1);
            this.Name = "Form2";
            //
            //
            //
            this.RootElement.ApplyShapeToControl = true;
            this.Text = "Form2";
            this.ThemeName = "ControlDefault";
            this.Load += new System.EventHandler(this.Form2_Load);
            ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.radButton1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.radButton2)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private Telerik.WinControls.UI.RadGridView radGridView1;
        private Telerik.WinControls.UI.RadButton radButton1;
        private Telerik.WinControls.UI.RadButton radButton2;
    }
}

Form2.cs

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

namespace RadControlsWinFormsApp1
{
    public partial class Form2 : Telerik.WinControls.UI.RadForm
    {
        public Form2()
        {
            InitializeComponent();

            this.radGridView1.Columns.Add(new GridViewTextBoxColumn("A"));
            this.radGridView1.Columns.Add(new GridViewDecimalColumn("B"));
            this.radGridView1.Rows.Add("A1", 1);
        }

        private void Form2_Load(object sender, EventArgs e)
        {

        }

        private void radButton1_Click(object sender, EventArgs e)
        {
            this.radGridView1.Rows[0].Cells["B"].Value = Convert.ToInt32(this.radGridView1.Rows[0].Cells["B"].Value) + 1;
        }

        private void radButton2_Click(object sender, EventArgs e)
        {
            this.Hide();
        }

        private void radGridView1_CellValueChanged(object sender, GridViewCellEventArgs e)
        {
            MessageBox.Show("Cell Value Changed");
        }
    }
}

Hope that helps, but let me know if yuo have any questions
Richard

[Richard Slade]

Hello,

Did this help? If so, please remember to mark as answer. If you need further help, please let me know
Thanks
Richard

[Zerka]

Hi Richard
Thanks for your example.  Actually instead of your this line of code, value is entered from user interface.

  this.radGridView1.Rows[0].Cells["B"].Value = Convert.ToInt32(this.radGridView1.Rows[0].Cells["B"].Value) + 1;

So I still has the problem. here is very short example.


RadForm1 Designer

namespace TestRadGrid
{
    partial class RadForm1
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.radButton1 = new Telerik.WinControls.UI.RadButton();
            ((System.ComponentModel.ISupportInitialize)(this.radButton1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
            this.SuspendLayout();
            //
            // radButton1
            //
            this.radButton1.Location = new System.Drawing.Point(84, 127);
            this.radButton1.Name = "radButton1";
            this.radButton1.Size = new System.Drawing.Size(130, 24);
            this.radButton1.TabIndex = 1;
            this.radButton1.Text = "radButton1";
            this.radButton1.Click += new System.EventHandler(this.radButton1_Click);
            //
            // RadForm1
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(298, 279);
            this.Controls.Add(this.radButton1);
            this.Name = "RadForm1";
            //
            //
            //
            this.RootElement.ApplyShapeToControl = true;
            this.Text = "RadForm1";
            this.ThemeName = "ControlDefault";
            ((System.ComponentModel.ISupportInitialize)(this.radButton1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private Telerik.WinControls.UI.RadButton radButton1;
    }
}

RadForm1 Class

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

namespace TestRadGrid
{
    public partial class RadForm1 : Telerik.WinControls.UI.RadForm
    {
        private RadForm2 form2;

        public RadForm1()
        {
            InitializeComponent();
        }

        private void radButton1_Click(object sender, EventArgs e)
        {
            if (form2 == null)
            {
                form2 = new RadForm2();
            }

            form2.ShowDialog(this);
        }
    }
}

RadForm2 Designer

namespace TestRadGrid
{
    partial class RadForm2
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            Telerik.WinControls.UI.GridViewDecimalColumn gridViewDecimalColumn5 = new Telerik.WinControls.UI.GridViewDecimalColumn();
            Telerik.WinControls.UI.GridViewDecimalColumn gridViewDecimalColumn6 = new Telerik.WinControls.UI.GridViewDecimalColumn();
            this.radGridView1 = new Telerik.WinControls.UI.RadGridView();
            this.radButton1 = new Telerik.WinControls.UI.RadButton();
            ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.radGridView1.MasterTemplate)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.radButton1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this)).BeginInit();
            this.SuspendLayout();
            //
            // radGridView1
            //
            this.radGridView1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(191)))), ((int)(((byte)(219)))), ((int)(((byte)(255)))));
            this.radGridView1.Cursor = System.Windows.Forms.Cursors.Default;
            this.radGridView1.Font = new System.Drawing.Font("Segoe UI", 8.25F);
            this.radGridView1.ForeColor = System.Drawing.Color.Black;
            this.radGridView1.ImeMode = System.Windows.Forms.ImeMode.NoControl;
            this.radGridView1.Location = new System.Drawing.Point(17, 41);
            //
            // radGridView1
            //
            this.radGridView1.MasterTemplate.AllowAddNewRow = false;
            this.radGridView1.MasterTemplate.AllowDeleteRow = false;
            gridViewDecimalColumn5.FormatString = "";
            gridViewDecimalColumn5.HeaderText = "column1";
            gridViewDecimalColumn5.Name = "column1";
            gridViewDecimalColumn5.TextAlignment = System.Drawing.ContentAlignment.MiddleRight;
            gridViewDecimalColumn5.Width = 101;
            gridViewDecimalColumn6.FormatString = "";
            gridViewDecimalColumn6.HeaderText = "column2";
            gridViewDecimalColumn6.Name = "column2";
            gridViewDecimalColumn6.TextAlignment = System.Drawing.ContentAlignment.MiddleRight;
            gridViewDecimalColumn6.Width = 139;
            this.radGridView1.MasterTemplate.Columns.AddRange(new Telerik.WinControls.UI.GridViewDataColumn[] {
            gridViewDecimalColumn5,
            gridViewDecimalColumn6});
            this.radGridView1.Name = "radGridView1";
            this.radGridView1.RightToLeft = System.Windows.Forms.RightToLeft.No;
            //
            //
            //
            this.radGridView1.RootElement.ForeColor = System.Drawing.Color.Black;
            this.radGridView1.ShowGroupPanel = false;
            this.radGridView1.Size = new System.Drawing.Size(269, 150);
            this.radGridView1.TabIndex = 0;
            this.radGridView1.Text = "radGridView1";
            //
            // radButton1
            //
            this.radButton1.Location = new System.Drawing.Point(86, 218);
            this.radButton1.Name = "radButton1";
            this.radButton1.Size = new System.Drawing.Size(130, 24);
            this.radButton1.TabIndex = 2;
            this.radButton1.Text = "radButton1";
            this.radButton1.Click += new System.EventHandler(this.radButton1_Click);
            //
            // RadForm2
            //
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(298, 279);
            this.Controls.Add(this.radButton1);
            this.Controls.Add(this.radGridView1);
            this.Name = "RadForm2";
            //
            //
            //
            this.RootElement.ApplyShapeToControl = true;
            this.Text = "RadForm2";
            this.ThemeName = "ControlDefault";
            this.Load += new System.EventHandler(this.RadForm2_Load);
            ((System.ComponentModel.ISupportInitialize)(this.radGridView1.MasterTemplate)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.radButton1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private Telerik.WinControls.UI.RadGridView radGridView1;
        private Telerik.WinControls.UI.RadButton radButton1;
    }
}

RadForm2 Class

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

namespace TestRadGrid
{
    public partial class RadForm2 : Telerik.WinControls.UI.RadForm
    {
        public RadForm2()
        {
            InitializeComponent();
        }

        private void radButton1_Click(object sender, EventArgs e)
        {
            Hide();
        }

        private void RadForm2_Load(object sender, EventArgs e)
        {
            if (radGridView1.RowCount < 1)
                radGridView1.Rows.AddNew();
                //radGridView1.Rows.Add(1000,1000); //just chaning value first time
        }
    }
}

Regards!

[Richard Slade]

Hello,

I can replicate your issue, which as far as I can see will need to be fixed by Telerik in an upcoming release. I will look for a workaround for you. In the meantime, I'd suggest opening a support ticket, and send them the example that you have given, also quuoting this forum thread

I'll let you know if/when I can find a workaround for you.
Richard

[Stefan]

Hi Michael,

Thank you for writing and for the provided details for reproducing this issue.

I have tested the described scenario and indeed it seems that there is an issue. We will investigate this case and we will address it in a future release. Meanwhile, I have noticed that calling the Show method instead of the ShowDialog avoids this issue and everything works as expected.

I have added this issue into our PITS. Your Telerik points have been updated for this report.

Best wishes,
Stefan
the Telerik team