Questions on UI for WinForms Forum

1 answer

157 views

Drag Drop from Toolbox

Hi.

What is the best way to react to a shape being drag-dropped onto the diagram from the toolbox?

The toolbox is in an additional form.

Regards

Bernhard

Diagram, DiagramRibbonBar, DiagramToolBox

answered on 21 Mar 2019

1 answer

1.0K+ views

For sidebar menu which control of telerik should i use

Please take a look at attached image...

For the left side bar menu on that image which control of telerik should i use?

Would you please lead me to examples of that?

Thanks in advance

Menu

answered on 20 Mar 2019

3 answers

287 views

Errors after controls updated

Hi

I've recently released a version of our software that had version 2019.1.117.40 of Telerik.

Soon afterwards I needed to reformat and rebuild my working environment, reinstall visual studio and telerik and received a telerik version error after loading up my solution. So I ran an upgrade which installed 2019.1.219.40.

After this I started experiencing errors in the Virtual Grid. Last week I added a thread to the forum about access violations when calling bestfit on a column, it was suggested that my code should wait until the form is loaded/shown before doing this.In version 2019.1.117.40 I hadn't experienced this problem despite all the hours I'd spent developing and testing.

The form in question contains a panel which is parented onto a host form, so it never receives a formshown event, I use the hostform shown event to call the code on the child. But, the child panel contains a pageview with 4 pages, each of which contains a virtual grid. Even though the form is visible, I'm experiencing that same access violation on the first page of data.

Now, I'm seeing another problem which I didn't experience in 2019.1.117.40, when I attempt to change the sort order.

"Collection was modified; enumeration operation may not execute"

   at System.Collections.ArrayList.ArrayListEnumeratorSimple.MoveNext()
   at Telerik.WinControls.UI.VirtualGridRowElement.<GetCellElements>d__0.MoveNext()
   at Telerik.WinControls.UI.VirtualGridRowElement.SynchronizeCells(Boolean updateContent)
   at Telerik.WinControls.UI.VirtualGridRowElement.Synchronize(Boolean updateContent)
   at Telerik.WinControls.UI.VirtualGridTableElement.SynchronizeRows(Boolean recursive, Boolean updateContent)
   at Telerik.WinControls.UI.VirtualGridTableElement.OnViewInfoPropertyChanged(Object sender, PropertyChangedEventArgs e)
   at Telerik.WinControls.RadObject.OnNotifyPropertyChanged(PropertyChangedEventArgs e)
   at Telerik.WinControls.UI.VirtualGridViewInfo.OnNotifyPropertyChanged(PropertyChangedEventArgs e)
   at Telerik.WinControls.RadObject.OnNotifyPropertyChanged(String propertyName)
   at Telerik.WinControls.UI.VirtualGridViewInfo.set_IsWaiting(Boolean value)
   at pulse.move.views.Helpers.MemberSelection.VirtualGridHandlerClassBase.WaitCursor(Boolean showWaiting) in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\Helpers\MemberSelection\VirtualGridHandlerClass.Base.cs:line 1059
   at pulse.move.views.Helpers.MemberSelection.VirtualGridHandlerClassBase.AskForData(Int32 pageIndex) in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\Helpers\MemberSelection\VirtualGridHandlerClass.Base.cs:line 1009
   at pulse.move.views.UserCentre.Tabs.GridHandlers.UserCentreVirtualGridHandler.AskForData(Int32 pageIndex) in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\UserCentre\Tabs\GridHandlers\UserCentreVirtualGridHandler.cs:line 94
   at pulse.move.views.Helpers.MemberSelection.VirtualGridHandlerClassBase.OnMasterViewSortChanged() in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\Helpers\MemberSelection\VirtualGridHandlerClass.Base.cs:line 847
   at pulse.move.views.Helpers.MemberSelection.VirtualGridHandlerClassBase.OnSortChanged(Object sender, VirtualGridEventArgs e) in W:\Projects\pulse.smartcentre.root\pulse.smartcentre\pulse.move.views\Helpers\MemberSelection\VirtualGridHandlerClass.Base.cs:line 865
   at Telerik.WinControls.UI.RadVirtualGridElement.OnSortDescriptorsChanged(VirtualGridViewInfo viewInfo)
   at Telerik.WinControls.UI.VirtualGridViewInfo.sortDescriptors_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   at Telerik.Collections.Generic.NotifyCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
   at Telerik.Collections.Generic.NotifyCollection`1.EndUpdate(Boolean notify)
   at Telerik.WinControls.UI.VirtualGridInputBehavior.HandleMouseUp(MouseEventArgs args)
   at Telerik.WinControls.UI.RadVirtualGrid.OnMouseUp(MouseEventArgs e)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Although there are backup directories, how do I rollback to this earlier version of controls now I've had to reformat?

VirtualGrid

answered on 20 Mar 2019

2 answers

145 views

The GridView control does not have IsCurrentCellDirty or CommitEdit properties

Hello, everyone.

When I use the GridView control, the new control does not have IsCurrentCellDirty or CommitEdit properties.

Now I want to use this property, how do I solve it in the new control.

Thank you

GridView

answered on 20 Mar 2019

1 answer

193 views

TrackBar - range mode - binding

In simple mode, binding works correctly.

..............

//Define property

private float start;
public float Start
{
get => start;
set
{
if (value == Start) return;
start = value;
OnPropertyChanget("Start");
}
}

..............................................

//Binding

radTrackBar1.DataBindings.Add("Value", Data, "Start", true, DataSourceUpdateMode.OnPropertyChanged);
radTrackBar2.DataBindings.Add("Value", Data, "Start", true, DataSourceUpdateMode.OnPropertyChanged);

.........................................................

How can I use binding in range mod?

radTrackBar1.Ranges[0].Start = 1;
radTrackBar1.Ranges[0].End = 50;
radTrackBar2.Ranges[0].Start = 1;
radTrackBar2.Ranges[0].End = 50;

//Define property ??????????????????????

//Binding ??????????????????????????

Thanks!

TrackBar

answered on 20 Mar 2019

3 answers

132 views

Background Color spreads to other cells when scrolling

I've looked at other posts, but I didn't see where I went wrong.

(review attached screenshot for a better understanding)

In my situation, I add background color to row cells where this is an "A" value in the cell. This stands for an aisle in a warehouse.

If you scroll slowly, then the background color stays within the rows with an "A", but if you scroll too fast, the display shows green in various cells. Also, if I clear the grid and rebuild it with new data, the background color is not reset. The previous rows that were green are still green.

What am I missing?

01.Private Sub dgvMain_CellFormatting(sender As Object, e As CellFormattingEventArgs) Handles dgvMain.CellFormatting

02. If _LeftOrRightConveyor = "LEFT" And e.CellElement.ColumnIndex = AisleColumnLeft_Idx Then

03. e.CellElement.BackColor = System.Drawing.Color.LightGreen

04. ElseIf _LeftOrRightConveyor = "RIGHT" And e.CellElement.ColumnIndex = AisleColumnRight_Idx Then

05. e.CellElement.BackColor = System.Drawing.Color.LightGreen

06. End If

07.

08. If e.CellElement.Value = "A" Then

09. e.CellElement.BackColor = System.Drawing.Color.Lime

10. End If

11.End Sub

GridView

answered on 20 Mar 2019

1 answer

235 views

Theme not being applied to show dialog

Hi For some reason the theme fluent dark is not being applied to a show dialog function. I have included the designer file and the main form code below for your to check but all other forms are working fine which is weird.

Main Form Code.

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;

using FuelActivityTrackerDapperDal;

using FuelActivityTrackerDapperDal.Models;

using FuelActivityTrackerDesktop.Forms;

using System.Linq;

namespace FuelActivityTrackerDesktop.Forms

{

public partial class Login : Telerik.WinControls.UI.RadForm

{

ActivityTrackerDapperDal db = new ActivityTrackerDapperDal();

public IEnumerable<Users> _users { get; set; }

public Login()

{

InitializeComponent();

}

private void Login_Load(object sender, EventArgs e)

{

_users = db.GetALLUsers();

ThemeResolutionService.ApplyThemeToControlTree(this, "FluentDark");

}

private void btnLogin_Click(object sender, EventArgs e)

{

if(txtUsername.Text == "")

{

MessageBox.Show("Please enter your login details", "Fuel");

}

Users _user = _users.Where(w => w.UserName.ToLower() == txtUsername.Text.Trim().ToLower() && w.Password.ToLower() == txtPassword.Text.Trim().ToLower()).FirstOrDefault();

LoggedIn.UserName = _user.UserName;

LoggedIn.UserId = _user.id;

LoggedIn.StaffId = _user.StaffId;

if (_user.isActive == true)

{

frmMain _frmmain = new frmMain();

this.Hide();

_frmmain.ShowDialog();

}

else

MessageBox.Show("Your account has been made inactive , Please check with Administrator", "Fuel");

DialogResult = DialogResult.OK;

}

private void txtPassword_KeyDown(object sender, KeyEventArgs e)

{

if (e.KeyCode == Keys.Enter)

btnLogin_Click(sender, e);

}

Designer file of the form.

namespace FuelActivityTrackerDesktop.Forms

{

partial class Login

{

/// <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()

{

System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Login));

this.imagePanel = new System.Windows.Forms.Panel();

this.logoPictureBox = new System.Windows.Forms.PictureBox();

this.radPanel1 = new Telerik.WinControls.UI.RadPanel();

this.radLabel3 = new Telerik.WinControls.UI.RadLabel();

this.radLabel2 = new Telerik.WinControls.UI.RadLabel();

this.radLabel1 = new Telerik.WinControls.UI.RadLabel();

this.txtPassword = new Telerik.WinControls.UI.RadTextBox();

this.txtUsername = new Telerik.WinControls.UI.RadTextBox();

this.btnCancel = new Telerik.WinControls.UI.RadButton();

this.btnLogin = new Telerik.WinControls.UI.RadButton();

this.fluentDarkTheme1 = new Telerik.WinControls.Themes.FluentDarkTheme();

this.fluentTheme1 = new Telerik.WinControls.Themes.FluentTheme();

this.imagePanel.SuspendLayout();

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

((System.ComponentModel.ISupportInitialize)(this.radPanel1)).BeginInit();

this.radPanel1.SuspendLayout();

((System.ComponentModel.ISupportInitialize)(this.radLabel3)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radLabel2)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radLabel1)).BeginInit();

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

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

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

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

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

this.SuspendLayout();

//

// imagePanel

//

this.imagePanel.Controls.Add(this.logoPictureBox);

this.imagePanel.Dock = System.Windows.Forms.DockStyle.Left;

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

this.imagePanel.Name = "imagePanel";

this.imagePanel.Size = new System.Drawing.Size(129, 148);

this.imagePanel.TabIndex = 9;

//

// logoPictureBox

//

this.logoPictureBox.Cursor = System.Windows.Forms.Cursors.Hand;

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

this.logoPictureBox.Image = ((System.Drawing.Image)(resources.GetObject("logoPictureBox.Image")));

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

this.logoPictureBox.Name = "logoPictureBox";

this.logoPictureBox.Size = new System.Drawing.Size(129, 148);

this.logoPictureBox.SizeMode = System.Windows.Forms.PictureBoxSizeMode.StretchImage;

this.logoPictureBox.TabIndex = 0;

this.logoPictureBox.TabStop = false;

//

// radPanel1

//

this.radPanel1.Controls.Add(this.radLabel3);

this.radPanel1.Controls.Add(this.radLabel2);

this.radPanel1.Controls.Add(this.radLabel1);

this.radPanel1.Controls.Add(this.txtPassword);

this.radPanel1.Controls.Add(this.txtUsername);

this.radPanel1.Location = new System.Drawing.Point(152, 12);

this.radPanel1.Name = "radPanel1";

this.radPanel1.Size = new System.Drawing.Size(369, 117);

this.radPanel1.TabIndex = 10;

this.radPanel1.Text = "radPanel1";

this.radPanel1.ThemeName = "FluentDark";

//

// radLabel3

//

this.radLabel3.AutoSize = false;

this.radLabel3.Location = new System.Drawing.Point(3, 74);

this.radLabel3.Name = "radLabel3";

this.radLabel3.Size = new System.Drawing.Size(123, 24);

this.radLabel3.TabIndex = 18;

this.radLabel3.Text = "Password";

this.radLabel3.ThemeName = "FluentDark";

//

// radLabel2

//

this.radLabel2.AutoSize = false;

this.radLabel2.Location = new System.Drawing.Point(3, 48);

this.radLabel2.Name = "radLabel2";

this.radLabel2.Size = new System.Drawing.Size(123, 24);

this.radLabel2.TabIndex = 17;

this.radLabel2.Text = "UserName";

this.radLabel2.ThemeName = "FluentDark";

//

// radLabel1

//

this.radLabel1.Location = new System.Drawing.Point(3, 12);

this.radLabel1.Name = "radLabel1";

this.radLabel1.Size = new System.Drawing.Size(156, 18);

this.radLabel1.TabIndex = 16;

this.radLabel1.Text = "Please enter your login details";

this.radLabel1.ThemeName = "FluentDark";

//

// txtPassword

//

this.txtPassword.Location = new System.Drawing.Point(132, 76);

this.txtPassword.Name = "txtPassword";

this.txtPassword.Size = new System.Drawing.Size(192, 24);

this.txtPassword.TabIndex = 15;

this.txtPassword.ThemeName = "FluentDark";

this.txtPassword.KeyDown += new System.Windows.Forms.KeyEventHandler(this.txtPassword_KeyDown);

//

// txtUsername

//

this.txtUsername.Location = new System.Drawing.Point(132, 48);

this.txtUsername.Name = "txtUsername";

this.txtUsername.Size = new System.Drawing.Size(192, 24);

this.txtUsername.TabIndex = 14;

this.txtUsername.ThemeName = "FluentDark";

//

// btnCancel

//

this.btnCancel.Location = new System.Drawing.Point(527, 42);

this.btnCancel.Name = "btnCancel";

this.btnCancel.Size = new System.Drawing.Size(110, 24);

this.btnCancel.TabIndex = 12;

this.btnCancel.Text = "Cancel";

this.btnCancel.ThemeName = "FluentDark";

//

// btnLogin

//

this.btnLogin.Location = new System.Drawing.Point(527, 12);

this.btnLogin.Name = "btnLogin";

this.btnLogin.Size = new System.Drawing.Size(110, 24);

this.btnLogin.TabIndex = 11;

this.btnLogin.Text = "Login";

this.btnLogin.ThemeName = "FluentDark";

this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);

//

// Login

//

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

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

this.ClientSize = new System.Drawing.Size(660, 148);

this.Controls.Add(this.imagePanel);

this.Controls.Add(this.radPanel1);

this.Controls.Add(this.btnCancel);

this.Controls.Add(this.btnLogin);

this.MaximizeBox = false;

this.MinimizeBox = false;

this.Name = "Login";

//

this.RootElement.ApplyShapeToControl = true;

this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;

this.Text = "Login";

this.ThemeName = "Fluent";

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

this.imagePanel.ResumeLayout(false);

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

((System.ComponentModel.ISupportInitialize)(this.radPanel1)).EndInit();

this.radPanel1.ResumeLayout(false);

this.radPanel1.PerformLayout();

((System.ComponentModel.ISupportInitialize)(this.radLabel3)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radLabel2)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radLabel1)).EndInit();

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

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

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

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

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

this.ResumeLayout(false);

}

#endregion

private System.Windows.Forms.Panel imagePanel;

private System.Windows.Forms.PictureBox logoPictureBox;

private Telerik.WinControls.UI.RadPanel radPanel1;

private Telerik.WinControls.UI.RadLabel radLabel3;

private Telerik.WinControls.UI.RadLabel radLabel2;

private Telerik.WinControls.UI.RadLabel radLabel1;

private Telerik.WinControls.UI.RadTextBox txtPassword;

private Telerik.WinControls.UI.RadTextBox txtUsername;

private Telerik.WinControls.UI.RadButton btnCancel;

private Telerik.WinControls.UI.RadButton btnLogin;

private Telerik.WinControls.Themes.FluentDarkTheme fluentDarkTheme1;

private Telerik.WinControls.Themes.FluentTheme fluentTheme1;

}

Themes and Visual Style Builder

answered on 19 Mar 2019

1 answer

539 views

[Solved] Document from Scanner

Hi,

Is there any option to get the pdf document directly from a scanner device?

Thanks in advance.

PdfViewer and PdfViewerNavigator

answered on 19 Mar 2019

8 answers

327 views

[Solved] Show "Click Here to Add a New Item"

Hi

I have a grid bound to an empty dataset. When I load the form, it shows an empty row in the grid instead of showing the "Click Here to Add a New Item". As soon as I've added a row, the "Click Here to Add a New Item" row appears. How can I get it to show "Click Here to Add a New Item" at the start instead of showing an empty row?

GridView