I am experiencing the same behaviour as the original poster.
In our DropDownLists we have a number
of really long items which we want to automatically size so they are
more easily visible and readable. There aren't loads of them but we
often have many similar items where the only differentiating text is at
the end and it's impossible to tell which one is which without this
behaviour. We do this by setting AutoSizeItems = true;
In the 2016 Q1 release we implemented this perfectly according to our requirements. In the 2017 R2 release this is now broken.
This behaviour is broken without any themes applied and also if the VisualStudio2012Light theme is applied (see attached image). I haven't tested any other themes.
Disabling animations makes no difference.
I am working in .NET 4.5 and don't have .NET 4.7 installed and there is no custom manifest.
Since this basically renders the list useless afterwards we need to fix this ASAP. Are there any workarounds for this?
I see there is a 2017 R2 SP1 out but I am loathe to update to this
version unless it definitely fixes the issue. Every time we update,
existing behaviour is changed or broken.
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
}
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()
{
Telerik.WinControls.UI.RadListDataItem radListDataItem1 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem2 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem3 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem4 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem5 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem6 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem7 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem8 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem9 = new Telerik.WinControls.UI.RadListDataItem();
Telerik.WinControls.UI.RadListDataItem radListDataItem10 = new Telerik.WinControls.UI.RadListDataItem();
this.radDropDownList1 = new Telerik.WinControls.UI.RadDropDownList();
((System.ComponentModel.ISupportInitialize)(this.radDropDownList1)).BeginInit();
this.SuspendLayout();
//
// radDropDownList1
//
this.radDropDownList1.AutoSizeItems = true;
this.radDropDownList1.DropDownAnimationEnabled = false;
radListDataItem1.Text = "ListItem 1";
radListDataItem2.Text = "ListItem 2";
radListDataItem3.Text = "ListItem 3";
radListDataItem4.Text = "ListItem 4";
radListDataItem5.Text = "ListItem 5";
radListDataItem6.Text = "ListItem 6";
radListDataItem7.Text = "ListItem 7";
radListDataItem8.Text = "ListItem 8";
radListDataItem9.Text = "ListItem 9";
radListDataItem10.Text = "ListItem 10";
this.radDropDownList1.Items.Add(radListDataItem1);
this.radDropDownList1.Items.Add(radListDataItem2);
this.radDropDownList1.Items.Add(radListDataItem3);
this.radDropDownList1.Items.Add(radListDataItem4);
this.radDropDownList1.Items.Add(radListDataItem5);
this.radDropDownList1.Items.Add(radListDataItem6);
this.radDropDownList1.Items.Add(radListDataItem7);
this.radDropDownList1.Items.Add(radListDataItem8);
this.radDropDownList1.Items.Add(radListDataItem9);
this.radDropDownList1.Items.Add(radListDataItem10);
this.radDropDownList1.Location = new System.Drawing.Point(82, 112);
this.radDropDownList1.Name = "radDropDownList1";
this.radDropDownList1.Size = new System.Drawing.Size(125, 20);
this.radDropDownList1.TabIndex = 0;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(284, 261);
this.Controls.Add(this.radDropDownList1);
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.radDropDownList1)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private Telerik.WinControls.UI.RadDropDownList radDropDownList1;
}