Hi Friends, in this article I will explain about How to add dynamic controls in VB.NET or C# windows forms or How to add textbox at runtime or How to dynamically add control with loop at Run time.
All the controls on a form are stored in the Controls collection. For this we have to use the System.Windows.Forms. All the controls are inherited from System.Windows.Forms. For this we have to use the System.Windows.Forms class.
Suppose if we want to add textboxes in the loop then we use this
process. Suppose if we to display some number of textboxes then we can’t take
the textboxes before run the code. For that time we can display textboxes at runtime.
Not only textboxes we can any controls like labels, buttons, checkboxes etc.
I already explained in the previous article How to Read data from Excel in VB.NET or C# windows forms | Export data from Excel to Text file All the controls on a form are stored in the Controls collection. For this we have to use the System.Windows.Forms. All the controls are inherited from System.Windows.Forms. For this we have to use the System.Windows.Forms class.
Example: In this we add multiple textboxes dynamically.
Copy and paste the below code and execute then we will get
10 textboxes dynamically.
Imports System.Windows.Forms
Public Class Form1
Dim i As Integer, txt As System.Windows.Forms.TextBox, lbl As System.Windows.Forms.Label
Dim btn As System.Windows.Forms.Button
Private Sub Form1_Load(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
For i
= 1 To 10
'for 1 until 10, create 10 textboxes
'create
dynamic textboxes
txt = New
System.Windows.Forms.TextBox 'create an instance of a TextBox control.
txt.Name = "txt" & i 'name
for the textboxes (txt1, txt2, etc...
Me.Controls.Add(txt)
'add the textboxes to me.contols
txt.Location = New
System.Drawing.Point(160, 10 + (i * 25)) 'location
points
Next
End Sub
End Class
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using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.Windows.Forms;
Public Class Form1
{
int i;
System.Windows.Forms.TextBox txt;
System.Windows.Forms.Label lbl;
System.Windows.Forms.Button btn;
private
void Form1_Load(System.Object sender, System.EventArgs e)
{
//for 1 until 10, create 10 textboxes
for
(i = 1; i <= 10; i++) {
//create dynamic textboxes
txt = new
System.Windows.Forms.TextBox();
//create an instance of a TextBox control.
txt.Name = "txt" + i;
//name for
the textboxes (txt1, txt2, etc...
this.Controls.Add(txt);
//add the textboxes to me.contols
txt.Location = new System.Drawing.Point(160, 10 + (i * 25));
//location points
}
}
Public
Form1()
{
Load += Form1_Load;
}
}
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In the above code we
declare textbox as txt As System.Windows.Forms.TextBox,i.e.textbox
is inherited from the System.Windows.Forms.TextBox.
If we dont give the location points then the
textbox is not display so we have give the location points ,in the above i take
it as txt.Location = New System.Drawing.Point(160, 10 + (i * 25))
We can apply the all properties of textbox to
this box like txt.Name = "txt" & i
Txt.text=”Aspdotnet-Kishore”
If we write Me.Controls.Add(txt).It
will add the textbox to the form.
The output of the above code will like below figure.......
The output of the above code will like below figure.......
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