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multicolumnCombobox

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MultiColumn ComboBox

This is a migrated thread and some comments may be shown as answers.

Roya asked on 26 Apr 2012, 01:08 PM

hi
I have a problem in multicolumnCombobox.
I set the dropdownStyle=DropDown .so when i do filtering, in some cases
when the filtering result is only one row ,this control   sugests and appends the this row,but i dont want it to append the selected row ,i only want the suggestion .for example i want to write BubllBar ,when i start to writing and Write 'Bub' ,multicolumnCombobox do filtering and the filtering row is 'Bube' ,so it appends 'Bube' and then i must delete the 'e' and write 'BubllBar ' .please help me to solve this problem

private void Form1_Load(object sender, EventArgs e)
        {
            DataTable dt = new DataTable();

            radMultiColumnComboBox1.AutoFilter = true;
            radMultiColumnComboBox1.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDown;
            dt.Columns.Add("Title", typeof(string));

            dt.Rows.Add("Tom");
            dt.Rows.Add("Bube");
            dt.Rows.Add("emy");
            dt.Rows.Add("Kate");

            radMultiColumnComboBox1.DataSource = dt;
            radMultiColumnComboBox1.EditorControl.FilterDescriptors.Add("Title", FilterOperator.Contains, string.Empty);

        }

10 Answers, 1 is accepted

Accepted

answered on 30 Apr 2012, 03:54 PM

Hello Roya,

Please can you try the following sample. This should demonstrate the SelectedValueChanged event and being able to change the selected value programatically.

Designer File

namespace RadControlsWinFormsApp1

{

partial class RadForm1

{

/// <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(RadForm1));

this.radMultiColumnComboBox1 = new Telerik.WinControls.UI.RadMultiColumnComboBox();

this.radButton1 = new Telerik.WinControls.UI.RadButton();

this.radButton2 = new Telerik.WinControls.UI.RadButton();

this.radButton3 = new Telerik.WinControls.UI.RadButton();

this.radButton4 = new Telerik.WinControls.UI.RadButton();

this.radButton5 = new Telerik.WinControls.UI.RadButton();

this.radButton6 = new Telerik.WinControls.UI.RadButton();

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

((System.ComponentModel.ISupportInitialize)(this.radMultiColumnComboBox1)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radButton1)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radButton2)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radButton3)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radButton4)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radButton5)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.radButton6)).BeginInit();

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

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

this.SuspendLayout();

//

// radMultiColumnComboBox1

//

// radMultiColumnComboBox1.NestedRadGridView

//

this.radMultiColumnComboBox1.EditorControl.BackColor = System.Drawing.SystemColors.Window;

this.radMultiColumnComboBox1.EditorControl.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.radMultiColumnComboBox1.EditorControl.ForeColor = System.Drawing.SystemColors.ControlText;

this.radMultiColumnComboBox1.EditorControl.Location = new System.Drawing.Point(0, 0);

//

// radMultiColumnComboBox1.NestedRadGridView

//

this.radMultiColumnComboBox1.EditorControl.MasterTemplate.AllowAddNewRow = false;

this.radMultiColumnComboBox1.EditorControl.MasterTemplate.AllowCellContextMenu = false;

this.radMultiColumnComboBox1.EditorControl.MasterTemplate.AllowColumnChooser = false;

this.radMultiColumnComboBox1.EditorControl.MasterTemplate.EnableGrouping = false;

this.radMultiColumnComboBox1.EditorControl.MasterTemplate.ShowFilteringRow = false;

this.radMultiColumnComboBox1.EditorControl.Name = "NestedRadGridView";

this.radMultiColumnComboBox1.EditorControl.ReadOnly = true;

this.radMultiColumnComboBox1.EditorControl.ShowGroupPanel = false;

this.radMultiColumnComboBox1.EditorControl.Size = new System.Drawing.Size(240, 150);

this.radMultiColumnComboBox1.EditorControl.TabIndex = 0;

this.radMultiColumnComboBox1.Location = new System.Drawing.Point(12, 12);

this.radMultiColumnComboBox1.Name = "radMultiColumnComboBox1";

//

this.radMultiColumnComboBox1.RootElement.AutoSizeMode = Telerik.WinControls.RadAutoSizeMode.WrapAroundChildren;

this.radMultiColumnComboBox1.Size = new System.Drawing.Size(204, 20);

this.radMultiColumnComboBox1.TabIndex = 0;

this.radMultiColumnComboBox1.TabStop = false;

this.radMultiColumnComboBox1.Text = "radMultiColumnComboBox1";

//

// radButton1

//

this.radButton1.Location = new System.Drawing.Point(12, 47);

this.radButton1.Name = "radButton1";

this.radButton1.Size = new System.Drawing.Size(29, 24);

this.radButton1.TabIndex = 1;

this.radButton1.Tag = resources.GetString("radButton1.Tag");

this.radButton1.Text = "1";

//

// radButton2

//

this.radButton2.Location = new System.Drawing.Point(47, 47);

this.radButton2.Name = "radButton2";

this.radButton2.Size = new System.Drawing.Size(29, 24);

this.radButton2.TabIndex = 2;

this.radButton2.Tag = resources.GetString("radButton2.Tag");

this.radButton2.Text = "2";

//

// radButton3

//

this.radButton3.Location = new System.Drawing.Point(82, 47);

this.radButton3.Name = "radButton3";

this.radButton3.Size = new System.Drawing.Size(29, 24);

this.radButton3.TabIndex = 2;

this.radButton3.Tag = resources.GetString("radButton3.Tag");

this.radButton3.Text = "3";

//

// radButton4

//

this.radButton4.Location = new System.Drawing.Point(117, 47);

this.radButton4.Name = "radButton4";

this.radButton4.Size = new System.Drawing.Size(29, 24);

this.radButton4.TabIndex = 2;

this.radButton4.Tag = resources.GetString("radButton4.Tag");

this.radButton4.Text = "4";

//

// radButton5

//

this.radButton5.Location = new System.Drawing.Point(152, 47);

this.radButton5.Name = "radButton5";

this.radButton5.Size = new System.Drawing.Size(29, 24);

this.radButton5.TabIndex = 2;

this.radButton5.Tag = resources.GetString("radButton5.Tag");

this.radButton5.Text = "5";

//

// radButton6

//

this.radButton6.Location = new System.Drawing.Point(187, 47);

this.radButton6.Name = "radButton6";

this.radButton6.Size = new System.Drawing.Size(29, 24);

this.radButton6.TabIndex = 2;

this.radButton6.Tag = resources.GetString("radButton6.Tag");

this.radButton6.Text = "6";

//

// radLabel1

//

this.radLabel1.Location = new System.Drawing.Point(12, 90);

this.radLabel1.Name = "radLabel1";

this.radLabel1.Size = new System.Drawing.Size(60, 16);

this.radLabel1.TabIndex = 3;

this.radLabel1.Text = "Selected...";

//

// RadForm1

//

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

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

this.ClientSize = new System.Drawing.Size(227, 125);

this.Controls.Add(this.radLabel1);

this.Controls.Add(this.radButton6);

this.Controls.Add(this.radButton5);

this.Controls.Add(this.radButton4);

this.Controls.Add(this.radButton3);

this.Controls.Add(this.radButton2);

this.Controls.Add(this.radButton1);

this.Controls.Add(this.radMultiColumnComboBox1);

this.Name = "RadForm1";

//

this.RootElement.ApplyShapeToControl = true;

this.Text = "RadForm1";

this.ThemeName = "ControlDefault";

((System.ComponentModel.ISupportInitialize)(this.radMultiColumnComboBox1)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radButton1)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radButton2)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radButton3)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radButton4)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radButton5)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.radButton6)).EndInit();

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

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

this.ResumeLayout(false);

this.PerformLayout();

}

#endregion

private Telerik.WinControls.UI.RadMultiColumnComboBox radMultiColumnComboBox1;

private Telerik.WinControls.UI.RadButton radButton1;

private Telerik.WinControls.UI.RadButton radButton2;

private Telerik.WinControls.UI.RadButton radButton3;

private Telerik.WinControls.UI.RadButton radButton4;

private Telerik.WinControls.UI.RadButton radButton5;

private Telerik.WinControls.UI.RadButton radButton6;

private Telerik.WinControls.UI.RadLabel radLabel1;

}

Form 1.cs

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 Telerik.WinControls.UI;

using Telerik.WinControls.Primitives;

namespace RadControlsWinFormsApp1

{

public partial class RadForm1 : Telerik.WinControls.UI.RadForm

{

public RadForm1()

{

InitializeComponent();

List<User> users = new List<User>();

int i = 0;

while (i <= 1000)

{

users.Add(new User(i, "User " + i.ToString()));

i++;

}

this.radButton1.Click += new EventHandler(radButton_Click);

this.radButton2.Click += new EventHandler(radButton_Click);

this.radButton3.Click += new EventHandler(radButton_Click);

this.radButton4.Click += new EventHandler(radButton_Click);

this.radButton5.Click += new EventHandler(radButton_Click);

this.radButton6.Click += new EventHandler(radButton_Click);

this.radMultiColumnComboBox1.SelectedValueChanged += new EventHandler(radMultiColumnComboBox1_SelectedValueChanged);

this.radMultiColumnComboBox1.DropDownStyle = RadDropDownStyle.DropDownList;

this.radMultiColumnComboBox1.DataSource = users;

this.radMultiColumnComboBox1.DisplayMember = "Name";

this.radMultiColumnComboBox1.ValueMember = "Id";

this.radMultiColumnComboBox1.SelectedValue = 1000;

}

void radMultiColumnComboBox1_SelectedValueChanged(object sender, EventArgs e)

{

this.radLabel1.Text = this.radMultiColumnComboBox1.SelectedValue.ToString();

}

void radButton_Click(object sender, EventArgs e)

{

int i = Convert.ToInt16(((RadButton)sender).Text);

this.radMultiColumnComboBox1.SelectedValue = i;

}

public class User

{

public User(int id, string name)

{

Id = id;

Name = name;

}

public User()

{ }

public int Id

{

get;

set;

}

public string Name

{

get;

set;

}

Hope that helps
Richard

answered on 02 May 2012, 10:02 AM

Hello,

Here is an updated sample that covers your scenario of dealing with null values

Designer File