I want to rename column, for example from gridViewTextBoxColumn9 to col_Name and then get access from code.

Instead dataGridView1.Columns["col_Name"].IsVisible = true I want to write col_Name.IsVisible = true

It is possible?

Hi,

I just noticed a terrible bug when trying to bind a list of business objects on a DropDownList :

Setting the DataSource erases both property values previously set on the designer.

Setting the DisplayMember through code works but as soon as I try to set ValueMember, it erases DisplayMember and doesn't set ValueMember either !!

        ddlLines.DataSource = lineService.GetAllLines();
        ddlLines.DisplayMember = nameof(Line.LineName);
        ddlLines.ValueMember = nameof(Line.LineId);

Here is the class :

public class Line
{
    [BrowsableAttribute(false)]
    public int LineId { get; set; }

    [DisplayName("Souche")]
    [Column(Order = 0)]
    public string LineName { get; set; }
}

This happens on a DropDownList inserted on a form and also inside a RibbonControl

Is this serious ??

Hi all.

Question: is it possible to translate (back and forth) mouse coordinates in RadPdfViewer to PDF coordinates on the relative page?

I do not need location inside Telerik internal document representation nor on screen but on the PDF representation for interoperability with other tools.

What I mean by PDF coordinates: a coordinate system where the unit is 1/72th of an inch, having the origin (coordinate 0,0) at the bottom left of the page, and X Y increase toward the top right corner, for example an A4 bottom left coordinates are (0,0) top right  (597.6 , 842.4) 

The desired effect would be something like

public (int pageNo, float pdfX, float pdfY) GetPdfCoordinates(RadPdfViewer viewer,  Point mouseEventLocation){
public (int pageNo, int X, int Y) GetViewerCoordinates(RadPdfViewer viewer, int page, float pdfX, float pdfY);

Reasons: I am currently using other libraries only for that specific purpose but the telerik pdf viewer is just as good except for this important feature that allows software to interoperate with third parties PDF tools.

Thank you all.

Hello,

I want to make editor for editing function list, something like screenshot below. I would like to ask for an advice, what's the best approach to do this. I have idea to use GridView with self referencing, using some background class for representation of this structure, and massive cell parsing/formatting/validating for handling second column with parameters, validating different types of parameters, coloring of invalid values etc. Or, it's just two level structure, is it better to use "normal" hierarchy, main level for functions, and second level for different parameter? I haven't tried anything yet, just asking for advice for the best approach, I think it will take more time to do this.

And second question, I was playing a little with hierarchies some time ago, and most scenarios needed data binding for correct hierarchy. Is it possible to do self referencing without data binding?

On a brand new Winforms project,

1/ Added 1 RadDock, Dock = Fill

2/ In RadDock Advanced Layout Designer, Add several toolwindows using Dockfill new ToolWindow

3/ Save and close Designer

4/ Run Project

When any toolwindow is moved to attempt to dock it freezes with the compass showing but no windows can be moved or docked. Attached image shows frozen state. No errors or anything raised

This is in Windows 11 with net6.0. Is this a bug or am I doing something wrong?

Hi,

I'm getting weird / unexpected behaviour when using the masked edit box configured to handle IP Addresses.

So using the latest Demo Application, I open up the Masked Edit Box, and in the IP edit box I type in 11.22.33.44

I then double click and highlight the 44 part, and type 6 to replace the 44 with a single 6, however the following is displayed

After clicking on OK this then changes to show the ip address as 11.22.33.255 It seems that clicking on 6 does not replace the 44 but gets inserted at the start of the element. Is there a workaround for this behaviour ?

Winforms, c#, version 2022.3.1109.40,

I know it must be me, but I'm testing gradient fill on a radpanel, but theres no change in appearance at either design or run time

Here's my extract from the designer file. GradientFill is set to linear which is the default.

private void InitializeComponent()
    {
      this.radPanel2 = new Telerik.WinControls.UI.RadPanel();
      ((System.ComponentModel.ISupportInitialize)(this.radPanel2)).BeginInit();
      this.SuspendLayout();
      //
      // radPanel2
      //
      this.radPanel2.Location = new System.Drawing.Point(112, 57);
      this.radPanel2.Name = "radPanel2";
      this.radPanel2.Size = new System.Drawing.Size(218, 107);
      this.radPanel2.TabIndex = 1;
      ((Telerik.WinControls.Primitives.FillPrimitive)(this.radPanel2.GetChildAt(0).GetChildAt(0))).BackColor2 = System.Drawing.Color.FromArgb(((int)(((byte)(0)))), ((int)(((byte)(198)))), ((int)(((byte)(241)))), ((int)(((byte)(79)))));
      ((Telerik.WinControls.Primitives.FillPrimitive)(this.radPanel2.GetChildAt(0).GetChildAt(0))).BackColor3 = System.Drawing.Color.FromArgb(((int)(((byte)(0)))), ((int)(((byte)(238)))), ((int)(((byte)(155)))), ((int)(((byte)(64)))));
      ((Telerik.WinControls.Primitives.FillPrimitive)(this.radPanel2.GetChildAt(0).GetChildAt(0))).BackColor4 = System.Drawing.Color.FromArgb(((int)(((byte)(0)))), ((int)(((byte)(74)))), ((int)(((byte)(228)))), ((int)(((byte)(243)))));
      ((Telerik.WinControls.Primitives.FillPrimitive)(this.radPanel2.GetChildAt(0).GetChildAt(0))).NumberOfColors = 4;
      ((Telerik.WinControls.Primitives.FillPrimitive)(this.radPanel2.GetChildAt(0).GetChildAt(0))).GradientStyle = Telerik.WinControls.GradientStyles.Linear;
      ((Telerik.WinControls.Primitives.FillPrimitive)(this.radPanel2.GetChildAt(0).GetChildAt(0))).PaintUsingParentShape = false;
      ((Telerik.WinControls.Primitives.FillPrimitive)(this.radPanel2.GetChildAt(0).GetChildAt(0))).BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(0)))), ((int)(((byte)(244)))), ((int)(((byte)(32)))), ((int)(((byte)(32)))));
      //
      // Form1
      //
      this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
      this.ClientSize = new System.Drawing.Size(800, 450);
      this.Controls.Add(this.radPanel2);
      this.Name = "Form1";
      this.Text = "Form1";
      ((System.ComponentModel.ISupportInitialize)(this.radPanel2)).EndInit();
      this.ResumeLayout(false);

    }

Hello,

I have had to reinstall all Visual Studio versions after some strange behavior, installation was somehow corrupted, VS installers haven't seen any VS versions installed (but they was working almost normally), so I have had to reinstall it, uninstall it manually by InstallCleanup.exe first, and then install VS2019 and VS2022 again. So much for context.

I have installed Telerik for WinForm then and I don't see any Telerik controls in toolbox. I reinstalled Telerik twice, also tried to use Toolbox Configurator, selected .NET4.0 version, but without success. I have the same problem on both VS2019 and 2022. Can you help me please?

Im having some trouble adding a spreadsheet to my RadPageViewPage since the spreadsheet requires to be on a thread. This still gives me 'Cross-thread operation not valid: Control '' accessed from a thread other than the thread it was created on.'.

Is there anyone that could explain what im doing wrong here? Thanks.

Edit. Updated the code a bit and this gives me that it requires to be on the STA thread. Its something im not understanding with these threadings in c#.