The following code implements the features we often encounter: When handling Email in the web page, there will be all selected or canceled Checkbox, and add the selected content to a TextBox.
There are two ways to implement: We assume that the mailing list is implemented with DataList, add CheckBox1 to the ItemTemplate to bind the library.
Using server control: Implemented in Checkbox's CheckedChanged event.
Private void CBSelectAll_Checkedchanged (Object Sender, System.Eventargs E)
{
IF (cbselectall.checked)
{
Checkbox CurrentCheckbox = new checkbox ();
Foreach (DatalistItem ItemChecked in Datalist1.Items)
{
CurrentCheckBox = (CHECKBOX) (ItemChecked.FindControl ("CheckBox1"));
CurrentCheckbox.checked = true;
}
}
Else
{
Checkbox CurrentCheckbox = new checkbox ();
Foreach (DatalistItem ItemChecked in Datalist1.Items)
{
CurrentCheckBox = (CHECKBOX) (ItemChecked.FindControl ("CheckBox1"));
CurrentCheckBox.checked = false;
}
}
}
This method is disadvantage that the reaction is too slow and does not adapt to customer needs.
Another way is to use JavaScript:
Add in HTML
