Questions on UI for WinForms Forum

1 answer

123 views

Hello,

This morning I updated a project I am currently working on that is using the Material theme to the newest Winforms controls release. Before when I would click on a button, the button would do a little "click" visual effect and then that was it. Now when I click on a button it plays that effect and then the button turns purple. Was this theme changed and how do I fix this? Having a button turn purple is extremely distracting and will most likely confuse the users of my programs.

Thanks,

Matt

Themes and Visual Style Builder

answered on 05 Jun 2018

5 answers

379 views

Getting Breadcrumb to act like Windows Explorer breadcrumb

Hello,

I am attempting to create a very simple Windows Explorer-like interface for a training program. This program consists of a treeview on the left, a listview on the right, and a breadcrumb along the top. When a user clicks on a node in the treeview, the listview is updated with a list of the folder's contents (files only). However, the breadcrumb I have attached to the treeview doesn't act at all as I expected. It appears to act like just a list of menus, whereas I want it to act like Windows File Explorer and be a button that takes the user to whatever folder is clicked, and then not show anything other than the total path to the folder selected on the treeview. I can't seem to find a setting that allows this.

How do I get the breadcrumb to act like Windows File Explorer?

Thanks,

Matt

Treeview

answered on 04 Jun 2018

7 answers

1.6K+ views

How can focus to custom cell element in CellBeginEdit event?

Hi everyone

I put a RadGridView in Form with enabled its edit mode (AllowEditRow = true), and has "id" and "name" columns, and three rows of data. Also I created a custom user control that has a TextBox and a Button (named it ccTest). Then I choose a cell from "name" column and any row at run time. Now I start to type letters from keyboard. In this case, I bring up the custom user control.

The problem is: The typed letters don't show in custom user control, because it's TextBox not focused yet. Therefore I must click one more time to focus it, before start type letters.

Question is: How can I focus the TextBox of custom user control when it appear from CellBeginEdit event?

Microsoft Visual Studio 2017 (C# language) installed on Windows 10 - Telerik WinForms 2017 R3 SP1 (2017.3.1017.40).

-------------------------------------------

ccTest.Designer.cs:

namespace TestGridFocus

{

partial class ccTest

{

/// <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 Component 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.textBox1 = new System.Windows.Forms.TextBox();

this.button1 = new System.Windows.Forms.Button();

this.SuspendLayout();

//

// textBox1

//

this.textBox1.Dock = System.Windows.Forms.DockStyle.Fill;

this.textBox1.Location = new System.Drawing.Point(0, 0);

this.textBox1.Multiline = true;

this.textBox1.Name = "textBox1";

this.textBox1.Size = new System.Drawing.Size(92, 20);

this.textBox1.TabIndex = 0;

//

// button1

//

this.button1.Dock = System.Windows.Forms.DockStyle.Right;

this.button1.Location = new System.Drawing.Point(92, 0);

this.button1.Name = "button1";

this.button1.Size = new System.Drawing.Size(28, 20);

this.button1.TabIndex = 1;

this.button1.Text = "?";

this.button1.UseVisualStyleBackColor = true;

//

// ccTest

//

this.Controls.Add(this.textBox1);

this.Controls.Add(this.button1);

this.Name = "ccTest";

this.Size = new System.Drawing.Size(120, 20);

this.ResumeLayout(false);

this.PerformLayout();

}

#endregion

private System.Windows.Forms.TextBox textBox1;

private System.Windows.Forms.Button button1;

}

ccTest.cs:

using System.Windows.Forms;

namespace TestGridFocus

{

public partial class ccTest : UserControl

{

public ccTest()

{

InitializeComponent();

}

public string Value

{

get

{

return textBox1.Text;

}

set

{

textBox1.Text = value;

}

Form1.Designer.cs:

namespace TestGridFocus

{

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.GridViewDecimalColumn gridViewDecimalColumn1 = new Telerik.WinControls.UI.GridViewDecimalColumn();

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

Telerik.WinControls.UI.GridViewDecimalColumn gridViewDecimalColumn2 = new Telerik.WinControls.UI.GridViewDecimalColumn();

Telerik.WinControls.UI.TableViewDefinition tableViewDefinition1 = new Telerik.WinControls.UI.TableViewDefinition();

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.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)

| System.Windows.Forms.AnchorStyles.Left)

| System.Windows.Forms.AnchorStyles.Right)));

this.radGridView1.Location = new System.Drawing.Point(12, 12);

//

this.radGridView1.MasterTemplate.AllowAddNewRow = false;

gridViewDecimalColumn1.FieldName = "id";

gridViewDecimalColumn1.HeaderText = "id";

gridViewDecimalColumn1.Name = "id";

gridViewDecimalColumn1.TextAlignment = System.Drawing.ContentAlignment.MiddleCenter;

gridViewTextBoxColumn1.FieldName = "name";

gridViewTextBoxColumn1.HeaderText = "name";

gridViewTextBoxColumn1.Name = "name";

gridViewTextBoxColumn1.Width = 150;

gridViewDecimalColumn2.FieldName = "age";

gridViewDecimalColumn2.HeaderText = "age";

gridViewDecimalColumn2.Name = "age";

gridViewDecimalColumn2.TextAlignment = System.Drawing.ContentAlignment.MiddleCenter;

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

gridViewDecimalColumn1,

gridViewTextBoxColumn1,

gridViewDecimalColumn2});

this.radGridView1.MasterTemplate.ViewDefinition = tableViewDefinition1;

this.radGridView1.Name = "radGridView1";

this.radGridView1.Size = new System.Drawing.Size(270, 237);

this.radGridView1.TabIndex = 0;

this.radGridView1.Text = "radGridView1";

this.radGridView1.CellBeginEdit += new Telerik.WinControls.UI.GridViewCellCancelEventHandler(this.radGridView1_CellBeginEdit);

this.radGridView1.CellEndEdit += new Telerik.WinControls.UI.GridViewCellEventHandler(this.radGridView1_CellEndEdit);

//

// Form1

//

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

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

this.ClientSize = new System.Drawing.Size(294, 261);

this.Controls.Add(this.radGridView1);

this.Name = "Form1";

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

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

private Telerik.WinControls.UI.RadGridView radGridView1;

}

Form1.cs:

using System;

using System.Data;

using System.Windows.Forms;

using Telerik.WinControls;

namespace TestGridFocus

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private DataTable GetData()

{

DataTable dt = new DataTable();

dt.Columns.Add("id", typeof(int));

dt.Columns.Add("name", typeof(string));

dt.Rows.Add(1, "Jack");

dt.Rows.Add(2, "Joe");

dt.Rows.Add(3, "Bob");

dt.AcceptChanges();

return dt;

}

private void Form1_Load(object sender, EventArgs e)

{

radGridView1.DataSource = GetData();

}

ccTest test = new ccTest();

private void radGridView1_CellBeginEdit(object sender, Telerik.WinControls.UI.GridViewCellCancelEventArgs e)

{

if (e.Column == radGridView1.Columns["name"])

{

RadHostItem item = new RadHostItem(test);

test.Value = e.Row.Cells[e.ColumnIndex].Value.ToString();

radGridView1.CurrentCell.Children.Add(item);

item.HostedControl.Focus();

}

private void radGridView1_CellEndEdit(object sender, Telerik.WinControls.UI.GridViewCellEventArgs e)

{

if (e.Column == radGridView1.Columns["name"])

{

e.Row.Cells[e.ColumnIndex].Value = test.Value;

radGridView1.CurrentCell.Children.RemoveAt(0);

}

GridView

answered on 04 Jun 2018

6 answers

366 views

Grid Header Space

How do I remove the white space above the grid columns?

I'm using the BusinessGrid theme and have looked everywhere trying to find how to remove this white space. It's at the very top of the grid above the header columns.

Thanks

GridView

answered on 04 Jun 2018

2 answers

565 views

auto width in Exporting to Excel

How do I set the column width of Excel to auto fit or any fix width in Cell Formatting? Thanks.

GridViewSpreadExport spreadExporter = new GridViewSpreadExport(gvInventory);
SpreadExportRenderer exportRenderer = new SpreadExportRenderer();
spreadExporter.CellFormatting += SpreadExporter_CellFormatting;
spreadExporter.ExportCompleted += SpreadExporter_ExportCompleted;
spreadExporter.RunExport(OutputFilePath, exportRenderer);

GridView

answered on 01 Jun 2018

2 answers

125 views

RadBradCrumb seems to be quiet incomplete/unfinished

RadBradCrumb is a nice idea, but seems to be not really finished.

First, there is no documentation at all.

This little page gives a hint, this thing exists, not more.

https://docs.telerik.com/devtools/winforms/treeview/breadcrumb

Second, the splitbuttons and the dropdownItems are nice initialized and working,

but the DefaultItem of the SplitButton is not set.

You cannot click on the Button, und go up the hierarchie, the most basic function of a breadcrumb.

You always have this dropdown-things only.

Additionally, the RadBradCrumb is quiet a Closed thing, there are no events to subscribe, no virtual methods to override, just nothing.

I have found a workaround for this, which makes it work es expected, but this should be default functionality.

public class BreadCrumbHandler

{

private RadBreadCrumb crumb;

public BreadCrumbHandler(RadBreadCrumb crumb)

{

this.crumb = crumb;

// there is not other access to the DefaultItem of the SplitButtons in the BreadCrumb

var r = crumb.RootElement.Children.First() as RadBreadCrumbElement;

r.Items.ItemsChanged += BreadCrumb_ItemsChanged;

}

private void BreadCrumb_ItemsChanged(RadItemCollection changed, RadItem target, ItemsChangeOperation operation)

{

if (operation == ItemsChangeOperation.Inserted)

{

RadSplitButtonElement btn = target as RadSplitButtonElement;

if (btn != null)

{

var defaultItem = new RadMenuItem(btn.Text);

defaultItem.Text = btn.Text;

defaultItem.Click += DefaultItem_Click;

btn.DefaultItem = defaultItem;

}

else if (operation == ItemsChangeOperation.Clearing)

{

foreach (var item in changed.OfType<RadSplitButtonElement>())

{

var menuItem = item.DefaultItem as RadMenuItem;

if (menuItem != null)

menuItem.Click -= DefaultItem_Click;

item.DefaultItem = null;

}

else if (operation == ItemsChangeOperation.Removing)

{

RadSplitButtonElement btn = target as RadSplitButtonElement;

if (btn != null)

{

var menuItem = btn.DefaultItem as RadMenuItem;

if (menuItem != null)

menuItem.Click -= DefaultItem_Click;

btn.DefaultItem = null;

}

private void DefaultItem_Click(object sender, EventArgs e)

{

var menuItem = (RadMenuItem)sender;

var currentNode = crumb.DefaultTreeView.SelectedNode;

while (currentNode != null)

{

if (currentNode.Text == menuItem.Text) // not really safe test, but works as long as Texts are distinct

{

crumb.DefaultTreeView.SelectedNode = currentNode;

return;

}

currentNode = currentNode.Parent;

}

Treeview

answered on 01 Jun 2018

1 answer

631 views

Paging with load on demand

How to do paging with load on demand with radgridview in WinForm?

I have downloaded the demo of winform from Telerik. But the left starting part of source code is cut off. I am using Windows 7. Pressing left arrow did not go to the leftmost part (attached screen shot).

Where can I downloaded the source code of demo of winform?

GridView

answered on 01 Jun 2018

3 answers

146 views

Problems leave Grid.MasterView.TableAddNewRow

Hello I have a problem once I'm in the Grid.MasterView.TableAddNewRow row there is no way out of this ESC and it does not leave this row, is there any way to leave this row if the user does not want to add anything? is a problem in the version of 2015 did not have this problem assumes that the version 2017 was going to be improved but has many problems

GridView

answered on 31 May 2018

1 answer

85 views

Gridview ColumnGroups - Dragdrop within group only

I'm using column groups. Users can rearrange columns but i would like to prevent them from dragging columns to another group.

Thanks,

John

GridView

answered on 30 May 2018

6 answers

486 views

Event UserAddingRow

Hi I have problems with the UserAddingRow event, in the child levels of the main if the property e.cancel = True does not let me leave the grid editor, even if I cancel the edition I can not leave the grid row editor, could someone help me thanks beforehand

GridView

answered on 30 May 2018