Set Listbox Value

[Derek Hart]

How can I set the listbox value and retrieve a listbox value with just text?
I have filled the listbox with items in the items collection property (very
simple, just one column of text items).

I will have the text from a database and I know it is in the list. How can I
set it and retrieve it?

Do I need to loop the listbox to find matching text and set that
selectedindex to true.

Any sample code would be appreciated to get the text and set the text.

[Teme64]

Re: Set Listbox Value

Derek Hart wrote:

How can I set the listbox value and retrieve a listbox value with just text?
I have filled the listbox with items in the items collection property (very
simple, just one column of text items).
>
I will have the text from a database and I know it is in the list. How can I
set it and retrieve it?
>
Do I need to loop the listbox to find matching text and set that
selectedindex to true.
>
Any sample code would be appreciated to get the text and set the text.
>
>

ListBox has FindString and FindStringExact methods.
Here's a sample to get started:

Private Sub Button1_Click(B yVal sender As Object, ByVal e As System.EventArg s) Handles Button1.Click
ListBox1.Items. Clear()
ListBox1.Items. Add("Banana")
ListBox1.Items. Add("is a")
ListBox1.Items. Add("fruit")
ListBox1.Items. Add("but")
ListBox1.Items. Add("monkey")
ListBox1.Items. Add("is an")
ListBox1.Items. Add("animal")
End Sub

Private Sub Button2_Click(B yVal sender As System.Object, ByVal e As System.EventArg s) Handles Button2.Click
Dim ThisIndex As Integer
ThisIndex = ListBox1.FindSt ringExact("monk ey")
If ThisIndex >= 0 Then
MessageBox.Show (ListBox1.Items (ThisIndex).ToS tring, _
"ListBox", _
MessageBoxButto ns.OK, _
MessageBoxIcon. Information)
ListBox1.Select edIndex = ThisIndex
ListBox1.Items( ThisIndex) = "donkey"
End If
End Sub


--

Teme64 @ http://windevblog.blogspot.com

[breitak67]

Re: Set Listbox Value


You're gonna laugh. It's this easy:

namespace ListBoxDemo
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.Componen tModel.IContain er components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name=\"disposin g\">true if managed resources should be
disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Disp ose();
}
base.Dispose(di sposing);
}
#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 InitializeCompo nent()
{
this.btnSetValu e = new System.Windows. Forms.Button();
this.btnGetValu e = new System.Windows. Forms.Button();
this.tbValue = new System.Windows. Forms.TextBox() ;
this.lbMyListBo x = new System.Windows. Forms.ListBox() ;
this.SuspendLay out();
//
// btnSetValue
//
this.btnSetValu e.Location = new System.Drawing. Point(199, 67);
this.btnSetValu e.Name = \"btnSetValue\" ;
this.btnSetValu e.Size = new System.Drawing. Size(75, 23);
this.btnSetValu e.TabIndex = 8;
this.btnSetValu e.Text = \"Set Value\";
this.btnSetValu e.UseVisualStyl eBackColor = true;
this.btnSetValu e.Click += new
System.EventHan dler(this.btnSe tValue_Click);
//
// btnGetValue
//
this.btnGetValu e.Location = new System.Drawing. Point(199, 12);
this.btnGetValu e.Name = \"btnGetValue\" ;
this.btnGetValu e.Size = new System.Drawing. Size(75, 23);
this.btnGetValu e.TabIndex = 7;
this.btnGetValu e.Text = \"Get Value\";
this.btnGetValu e.UseVisualStyl eBackColor = true;
//
// tbValue
//
this.tbValue.Lo cation = new System.Drawing. Point(190, 41);
this.tbValue.Na me = \"tbValue\";
this.tbValue.Si ze = new System.Drawing. Size(100, 20);
this.tbValue.Ta bIndex = 6;
//
// lbMyListBox
//
this.lbMyListBo x.FormattingEna bled = true;
this.lbMyListBo x.Items.AddRang e(new object[] {
\"Alpha\",
\"Beta\",
\"Delta\",
\"Gamma\"});
this.lbMyListBo x.Location = new System.Drawing. Point(12, 12);
this.lbMyListBo x.Name = \"lbMyListBox\" ;
this.lbMyListBo x.Size = new System.Drawing. Size(120, 95);
this.lbMyListBo x.TabIndex = 5;
this.lbMyListBo x.Click += new
System.EventHan dler(this.lbMyL istBox_Click);
//
// Form1
//
this.AutoScaleD imensions = new System.Drawing. SizeF(6F, 13F);
this.AutoScaleM ode = System.Windows. Forms.AutoScale Mode.Font;
this.ClientSize = new System.Drawing. Size(365, 264);
this.Controls.A dd(this.btnSetV alue);
this.Controls.A dd(this.btnGetV alue);
this.Controls.A dd(this.tbValue );
this.Controls.A dd(this.lbMyLis tBox);
this.Name = \"Form1\";
this.Text = \"Form1\";
this.ResumeLayo ut(false);
this.PerformLay out();
}
#endregion
private System.Windows. Forms.Button btnSetValue;
private System.Windows. Forms.Button btnGetValue;
private System.Windows. Forms.TextBox tbValue;
private System.Windows. Forms.ListBox lbMyListBox;
}
}

using System;
using System.Collecti ons.Generic;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows. Forms;
namespace ListBoxDemo
{
public partial class Form1 : Form
{
public Form1()
{
InitializeCompo nent();
}
private void lbMyListBox_Cli ck(object sender, EventArgs e)
{
this.tbValue.Te xt = this.lbMyListBo x.SelectedItem. ToString();
}
private void btnSetValue_Cli ck(object sender, EventArgs e)
{
this.lbMyListBo x.SelectedItem = this.tbValue.Te xt;
}
}
}


--
breitak67

[breitak67]

Re: Set Listbox Value


In a web app the ListBox will be populated with ListItem objects. The
Items property of the listbox has a "FindByTest " method that returns a
ListItem object that you can set the .SelectedItem property to.


--
breitak67

[Jack Jackson]

Re: Set Listbox Value

On Tue, 14 Oct 2008 15:50:14 -0700, "Derek Hart"
<derekmhart@yah oo.comwrote:

>How can I set the listbox value and retrieve a listbox value with just text?
>I have filled the listbox with items in the items collection property (very
>simple, just one column of text items).
>
>I will have the text from a database and I know it is in the list. How can I
>set it and retrieve it?
>
>Do I need to loop the listbox to find matching text and set that
>selectedinde x to true.
>
>Any sample code would be appreciated to get the text and set the text.
>

Listbox has a SelectedValue property. I don't know how it behaves if
the Listbox allows multiple items to be selected.

[Cor Ligthert[MVP]]

Re: Set Listbox Value

Derek,

In the same way as a Combobox

Create a collection by instance a datatable which is the most simple to use
with a listbox

Set that as the DataSource
Set one column to the displaymember
Set another column to the valuemember

You are ready

Cor

"Derek Hart" <derekmhart@yah oo.comwrote in message
news:uiKy88kLJH A.5232@TK2MSFTN GP05.phx.gbl...

How can I set the listbox value and retrieve a listbox value with just
text? I have filled the listbox with items in the items collection
property (very simple, just one column of text items).
>
I will have the text from a database and I know it is in the list. How can
I set it and retrieve it?
>
Do I need to loop the listbox to find matching text and set that
selectedindex to true.
>
Any sample code would be appreciated to get the text and set the text.
>

[Jeff Johnson]

Re: Set Listbox Value

"Derek Hart" <derekmhart@yah oo.comwrote in message
news:uiKy88kLJH A.5232@TK2MSFTN GP05.phx.gbl...

How can I set the listbox value and retrieve a listbox value with just
text? I have filled the listbox with items in the items collection
property (very simple, just one column of text items).
>
I will have the text from a database and I know it is in the list. How can
I set it and retrieve it?
>
Do I need to loop the listbox to find matching text and set that
selectedindex to true.
>
Any sample code would be appreciated to get the text and set the text.

Did

myListBox.Text = someTextIGotFro mMyDatabase

not work for you?