Example Analysis of binding non-bool data CheckBox Control in Windows Form
Today, I will talk to you about the example analysis of binding non-bool type data CheckBox controls in Windows Form. Many people may not know much about it. In order to make you understand better, the editor has summarized the following content for you. I hope you can get something according to this article.
The checked property of CheckBox cannot be directly bound to non-Boolean data, so the following extension is made.
When using it, you need to set two properties first
CheckedValue-the value represented when selected
UnCheckedValue-the value represented if it is not selected
For example
CheckedValue = "male"
UnCheckedValue = "female"
Then bind the data to the bindText property
For example:
EnjoyCheckBox1.DataBindings.Add ("BindText", ds, "cname")
Source code:
Using System
Using System.Collections
Using System.ComponentModel
Using System.Drawing
Using System.Data
Using System.Windows.Forms
Namespace Enjoy.Interface.Control
{
/ / /
/ / A summary description of the EnjoyCheckBox.
/ / /
Public class EnjoyCheckBox: System.Windows.Forms.CheckBox
{
/ / /
/ / required designer variables.
/ / /
Private System.ComponentModel.Container components = null
Public EnjoyCheckBox ()
{
/ / this call is required by the Windows.Forms forms designer.
InitializeComponent ()
/ / TODO: add any initialization after the InitializeComponent call
}
/ / /
/ Clean up all resources in use.
/ / /
Protected override void Dispose (bool disposing)
{
If (disposing)
{
If (components! = null)
{
Components.Dispose ()
}
}
Base.Dispose (disposing)
}
# Code generated by region component designer
/ / /
/ / the designer supports the required methods-do not use the code editor
/ / modify the contents of this method.
/ / /
Private void InitializeComponent ()
{
Components = new System.ComponentModel.Container ()
}
# endregion
Private object m_BindText
Private object m_CheckedValue
Private object m_UnCheckedValue
/ / /
/ / bind properties of the database
/ / /
Public object BindText
{
Get
{
Return m_BindText
}
Set
{
M_BindText = value
If ((masked BindTextents null) & & (CheckedValueVerification null) & & (UnCheckedValueVerification null)
{
If (m_BindText.Equals (CheckedValue))
{
If (! this.Checked)
{
This.Checked = true
}
}
If (m_BindText.Equals (UnCheckedValue))
{
If (this.Checked)
{
This.Checked = false
}
}
}
}
}
/ / /
/ / the value (in the database) represented when selected
/ / /
Public object CheckedValue
{
Get
{
Return m_CheckedValue
}
Set
{
M_CheckedValue = value
}
}
/ / /
/ / the value (in the database) represented if it is not selected
/ / /
Public object UnCheckedValue
{
Get
{
Return m_UnCheckedValue
}
Set
{
M_UnCheckedValue = value
}
}
Protected override void OnCheckedChanged (EventArgs e)
{
Base.OnCheckedChanged (e)
If (this.Checked)
{
BindText = CheckedValue
}
If (! this.Checked)
{
BindText = UnCheckedValue
}
}
}
}
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