Questions on UI for WinForms Forum

1 answer

227 views

RadScheduler datasource, update is slow.

I have a RadScheduler with a datasource initated like this:

private void InitiateBookingDataSource()

{

if (_appointmentBookings == null) _appointmentBookings = new BindingList<Booking>();

var dataSource = new SchedulerBindingDataSource();

var mappingInfo = new AppointmentMappingInfo

{

Start = "StartTime",

End = "EndTime",

Summary = "BookingSubject",

Description = "BookingDescription",

BackgroundId = "BackgroundId",

AllDay = "AllDay",

RecurrenceRule = "RecurrenceRule",

Exceptions = "Exceptions",

MasterEventId = "MasterEventId",

Visible = "Visible"

};

mappingInfo.Mappings.Add(new SchedulerMapping("CaseId", "CaseId"));

mappingInfo.Mappings.Add(new SchedulerMapping("PratId", "PratId"));

mappingInfo.Mappings.Add(new SchedulerMapping("BoothId", "BoothId"));

mappingInfo.Mappings.Add(new SchedulerMapping("CaseDesc", "CaseDesc"));

mappingInfo.Mappings.Add(new SchedulerMapping("BoothDesc", "BoothDesc"));

dataSource.EventProvider.Mapping = mappingInfo;

dataSource.EventProvider.DataSource = _appointmentBookings;

dataSource.EventProvider.AppointmentFactory = rsBookings.AppointmentFactory;

rsBookings.DataSource = dataSource;

}

The appointments are initiated and updated by calling the method below. The problem is that it takes "forever" if the number of appointments exceeds approx 50. Is there a way to speed it up? I have tried async await, but as I am new to that procedure I haven't been able to implement it successfully.

Regards, Jill-Connie Lorentsen

private void InitiateAppointments(IEnumerable<Booking> bookings)

{

try

{

if (_appointmentBookings == null) _appointmentBookings = new BindingList<Booking>();

rsBookings.Appointments.Clear();

_appointmentBookings.Clear();

foreach (var booking in bookings)

{

var appointment = booking;

appointment.BackgroundId = _booths.Find(b => b.BoothId == booking.BoothId).BackgroundId;

appointment.Exceptions.ForEach(b => b.BackgroundId = _booths.Find(x => x.BoothId == b.BoothId).BackgroundId);

_appointmentBookings.Add(appointment);

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

Scheduler and Reminder

answered on 26 Jun 2014

3 answers

148 views

GridView like Excel

Hi,

I'm creating a GridView like MS Excel.
If the user reach the last row and press arrow down it will add new row.
And also i want to apply this add new row on Scrolling.
I'd appreciate if you can help.
Thanks.

GridView

answered on 25 Jun 2014

3 answers

316 views

How to set the RadDropDownButton fontcolor

I am trying to set the RadDropDownButton font color by programming by setting this.btnActionOfDeviceTask.ForeColor,but the font color does change at all, is there the way to set the font color?
//
// btnActionOfDeviceTask
//
this.btnActionOfDeviceTask.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)));
this.btnActionOfDeviceTask.Items.AddRange(new Telerik.WinControls.RadItem[] {
this.btnEnableDeviceofTask,
this.btnDisableDeviceOfTask}
);
this.btnActionOfDeviceTask.Location = new System.Drawing.Point(310, 7);
this.btnActionOfDeviceTask.Name = "btnActionOfDeviceTask";
this.btnActionOfDeviceTask.Text = "Edit task state";
this.btnActionOfDeviceTask.Font = new System.Drawing.Font("Segoe UI", 10F, System.Drawing.FontStyle.Regular);
this.btnActionOfDeviceTask.ForeColor = System.Drawing.Color.FromArgb(21, 66, 139);
this.btnActionOfDeviceTask.BackColor = System.Drawing.Color.Transparent;
this.btnActionOfDeviceTask.Size = new System.Drawing.Size(136, 24);
this.btnActionOfDeviceTask.TabIndex = 77;
this.btnActionOfDeviceTask.Enabled = false;

Wizard

answered on 25 Jun 2014

7 answers

1.9K+ views

CellFormatting performance issue

Hi,

I'm using Version 2011.1.11.419, and have been tasked to do some performance tuning I noticed that the Cellformatting event gets called a bit more often than I would like, especially at form loading. I found that if I place the code to set the datasource for the radGridView in the load event of the form, that it gets called much more frequently than if placed in the forms constructor.

In the code snippets below, I'm creating a simple grid with 5 columns and 2 rows - all of type GridTextBoxColumn. When assigning the datasource in the constructor, it generates 25 calls to the CellFormatting event. If I move the datasource assignment to the form load event, it generates 35 calls. The problem is even more pronounced when I call the radGridView.LoadLayout function. If placed in the constructor, it still calls the CellFormatting event 25 times, but when I move both the datasource and LoadLayout calls to the form load event, CellFormatting gets called a whopping 90 times! Note that the xml file that I'm using is nothing crazy - simply the output from saving the contents of this grid in Visual Studio using the radGridView property builder.

I've tried to use radGridView.BeginInit, and radGridView.SuspendLayout to decrease the number of calls while the grid is being set up, but neither seem to have any effect. Should I resign myself to moving radGridView code to the forms constructor, or is there a way to accomplish this in the form load event?

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;

namespace RadGridTest

{

public partial class Form1 : Form

{

private Telerik.WinControls.UI.RadGridView radGridView1;

private int execCount = 0;

private int beginTime;

private int endTime;

private BindingList<MyData> list;

public Form1()

{

beginTime = Environment.TickCount;

InitializeComponent();

list = new BindingList<MyData>(); ;

for (int i = 0; i <= 1; i++)

{

list.Add(new MyData(100, i, i));

}

//radGridView1.DataSource = list;

//radGridView1.LoadLayout("gridFormat.xml");

}

private void Form1_Load(object sender, EventArgs e)

{

// These commented lines cause much additional overhead in calling the CellFormatting function

// from the form_load event rather than the constructor.

radGridView1.DataSource = list;

radGridView1.LoadLayout("gridFormat.xml");

endTime = Environment.TickCount;

MessageBox.Show("Load Time: " + (endTime - beginTime).ToString() + Environment.NewLine +

"gridformat calls: " + execCount.ToString());

}

void radGridView1_CellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)

{

execCount++;

if (e.CellElement.ColumnInfo is GridViewDataColumn)

{

GridViewDataColumn dataCol = e.CellElement.ColumnInfo as GridViewDataColumn;

if (e.CellElement.Text != "")

switch (dataCol.FieldName)

{

case "B": e.CellElement.Text = Convert.ToDecimal(e.CellElement.Value).ToString("C");

break;

case "D":

case "E":

if (Convert.ToDecimal(e.CellElement.Value) % 2 == 0)

e.CellElement.Text = Convert.ToDecimal(e.CellElement.Value).ToString("#,##0.0000");

else

e.CellElement.Text = Convert.ToDecimal(e.CellElement.Value).ToString("#,##0.00");

break;

}

public class MyData

{

public string A { get; set; }

public int B { get; set; }

public string C { get; set; }

public int D { get; set; }

public int E { get; set; }

public MyData(int b, int d, int e)

{

A = "Money";

B = b;

C = "Float";

D = d;

E = e;

}

// radGridView designer settings below

#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.GridViewTextBoxColumn gridViewTextBoxColumn1 = new Telerik.WinControls.UI.GridViewTextBoxColumn();

Telerik.WinControls.UI.GridViewTextBoxColumn gridViewTextBoxColumn2 = new Telerik.WinControls.UI.GridViewTextBoxColumn();

Telerik.WinControls.UI.GridViewTextBoxColumn gridViewTextBoxColumn3 = new Telerik.WinControls.UI.GridViewTextBoxColumn();

Telerik.WinControls.UI.GridViewTextBoxColumn gridViewTextBoxColumn4 = new Telerik.WinControls.UI.GridViewTextBoxColumn();

Telerik.WinControls.UI.GridViewTextBoxColumn gridViewTextBoxColumn5 = new Telerik.WinControls.UI.GridViewTextBoxColumn();

this.radGridView1 = new Telerik.WinControls.UI.RadGridView();

((System.ComponentModel.ISupportInitialize)(this.radGridView1)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radGridView1.MasterTemplate)).BeginInit();

this.SuspendLayout();

//

// radGridView1

//

this.radGridView1.BackColor = System.Drawing.SystemColors.Control;

this.radGridView1.Cursor = System.Windows.Forms.Cursors.Default;

this.radGridView1.Dock = System.Windows.Forms.DockStyle.Fill;

this.radGridView1.Font = new System.Drawing.Font("Segoe UI", 8.25F);

this.radGridView1.ForeColor = System.Drawing.SystemColors.ControlText;

this.radGridView1.ImeMode = System.Windows.Forms.ImeMode.NoControl;

this.radGridView1.Location = new System.Drawing.Point(0, 0);

//

// radGridView1

//

this.radGridView1.MasterTemplate.AutoGenerateColumns = false;

gridViewTextBoxColumn1.FieldName = "A";

gridViewTextBoxColumn1.FormatInfo = new System.Globalization.CultureInfo("");

gridViewTextBoxColumn1.FormatString = "";

gridViewTextBoxColumn1.HeaderText = "column1";

gridViewTextBoxColumn1.Name = "column1";

gridViewTextBoxColumn1.Width = 76;

gridViewTextBoxColumn2.FieldName = "B";

gridViewTextBoxColumn2.FormatInfo = new System.Globalization.CultureInfo("");

gridViewTextBoxColumn2.FormatString = "";

gridViewTextBoxColumn2.HeaderText = "column2";

gridViewTextBoxColumn2.Name = "column2";

gridViewTextBoxColumn2.Width = 81;

gridViewTextBoxColumn3.FieldName = "C";

gridViewTextBoxColumn3.FormatInfo = new System.Globalization.CultureInfo("");

gridViewTextBoxColumn3.FormatString = "";

gridViewTextBoxColumn3.HeaderText = "column3";

gridViewTextBoxColumn3.Name = "column3";

gridViewTextBoxColumn3.Width = 82;

gridViewTextBoxColumn4.FieldName = "D";

gridViewTextBoxColumn4.FormatInfo = new System.Globalization.CultureInfo("");

gridViewTextBoxColumn4.FormatString = "";

gridViewTextBoxColumn4.HeaderText = "column4";

gridViewTextBoxColumn4.Name = "column4";

gridViewTextBoxColumn4.Width = 90;

gridViewTextBoxColumn5.FieldName = "E";

gridViewTextBoxColumn5.FormatInfo = new System.Globalization.CultureInfo("");

gridViewTextBoxColumn5.FormatString = "";

gridViewTextBoxColumn5.HeaderText = "column5";

gridViewTextBoxColumn5.Name = "ProgressBar";

gridViewTextBoxColumn5.Width = 88;

this.radGridView1.MasterTemplate.Columns.AddRange(new Telerik.WinControls.UI.GridViewDataColumn[] {

gridViewTextBoxColumn1,

gridViewTextBoxColumn2,

gridViewTextBoxColumn3,

gridViewTextBoxColumn4,

gridViewTextBoxColumn5});

this.radGridView1.Name = "radGridView1";

this.radGridView1.Padding = new System.Windows.Forms.Padding(0, 0, 0, 1);

this.radGridView1.ReadOnly = true;

this.radGridView1.RightToLeft = System.Windows.Forms.RightToLeft.No;

//

this.radGridView1.RootElement.Padding = new System.Windows.Forms.Padding(0, 0, 0, 1);

this.radGridView1.ShowGroupPanel = false;

this.radGridView1.Size = new System.Drawing.Size(599, 416);

this.radGridView1.TabIndex = 0;

this.radGridView1.Text = "radGridView1";

this.radGridView1.CellFormatting += new Telerik.WinControls.UI.CellFormattingEventHandler(this.radGridView1_CellFormatting);

//

// Form1

//

this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);

this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

this.ClientSize = new System.Drawing.Size(599, 416);

this.Controls.Add(this.radGridView1);

this.Name = "Form1";

this.Text = "Form1";

this.Load += new System.EventHandler(this.Form1_Load);

((System.ComponentModel.ISupportInitialize)(this.radGridView1.MasterTemplate)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radGridView1)).EndInit();

this.ResumeLayout(false);

}

#endregion

GridView

answered on 24 Jun 2014

2 answers

248 views

Modify columns in GridView with Condition

For C# winforms.
I wanted to check for each cells in a RadGridView. Wanted to add a eventhandler, once all data dataloaded.
For the cell with value "Completed" I would like to change the cell into a button, lets say a radButton named "radButtonView".

Anyone have any idea how to do that?
A simple example will do :)

GridView

answered on 24 Jun 2014

1 answer

219 views

DataTypeConverter not working with filtering

I am having a problem using filtering with a column which has a DataTypeConverter specified.

My object has a bool value which I have bound to a text box column. I use a TypeConverter to convert this bool to a string (and back); true converts to "group", false converts to "individual". This works fine except when I try to use filtering. I chose "equals" and entered "individual"; I expected my type converter to be called so it could convert "invidual" to false, but the type converter was not getting called at all. When I entered "false" into the filter my type converter was finally called but was passed a bool; it wanted me to convert bool to bool?!. It seems that the filter is converting the string to bool itself and not using my type converter. After I typed in "false" the filter showed "Equals: individual" and seemed to work correctly.

This behavior is a problem since I cannot ask my end users to type in "true" and "false" and remember which maps to which display value. It seems like not using my specified TypeConverter to convert the string back to the match value is a bug.

Can you suggest a work around? Will this be fixed?

GridView

answered on 24 Jun 2014

5 answers

117 views

Postback problem

Hello,
telerik radgrid dissapearing on postback ,
when i click in radgrid , its postback and dissapear , plz anyone help asap.

thanks in advance

Regards,
Muhammad Arsal Khan

New Product Suggestions

answered on 24 Jun 2014

12 answers

710 views

[Solved] Radiobutton in RadGridView

Hi,

I am using the code from the link http://www.telerik.com/support/kb/winforms/gridview/creating-a-radradiobuttoncellelement.aspx to create a RadRadioButtonElement. Unlike the example provided, I am using just one radiobutton per cell instead of three.

At the row level the RadRadioButtonElement should function like a checkbox. User should be allowed to set the ToggleState to On or Off on a particular row.

Among the rows in the RadGridView, there cannot be more than one row which has this column's ToggleState set to On.

Please check the attached image to get an idea.

GridView

answered on 24 Jun 2014

1 answer

156 views

Get backcolor and forecolor of SubItem

I'm setting the backcolor and forecolor of SubItems in the radListView1_CellFormatting event. Later, I'm exporting my List View to Excel, and I need to access the backcolor and forecolor of each SubItem/cell. Is this possible? I see the property for Item backcolor, but I can't get at the SubItem backcolor.

ListView

answered on 23 Jun 2014

1 answer

187 views

Gridview Cell Edit Click

I'm able to edit cells correctly, however, if there is a cell with a particular long sentence, it will go to the end of the sentence when I click into the cell to edit.
Example, a cell containing a sentence
"I watched XXXXX TV show this weekend" - I click in there and I can click directly into the XXXXX as the sentence isn't too long.
"I first went to the store then came home and watched XXXXX TV show" - I click in there and it will highlight the sentence but take me to the last part of the sentence that fills up the cell.

Is there a way to adjust where you can click into the cell or an easier way to edit in the situation where a sentence is much longer?

Thanks,
Jeff

GridView

answered on 23 Jun 2014