Readonly ComboBox in WinForms

问题

I'm writing a GUI in C#, Visual Studio 2008, using the Designer and WinForms. I've got a ComboBox control, and I'd like it to only allow to select from the provided options and not to accept a user-entered string. It doesn't appear to have a ReadOnly property, and disabling it hinders the readability of the control (as well as disallowing user-selection).

回答1:

Set DropDownStyle to "DropDownList"

回答2:

Set the ComboBox.DropDownStyle property to ComboBoxStyle.DropDownList.

回答3:

Another simple way to go about it.

private void combobox1_KeyPress(object sender, KeyPressEventArgs e)
{
    e.Handled = true;
}

回答4:

Use code similar to the following to set the allowed options and only those options.

comboBox1.DropDownStyle = ComboBoxStyle.DropDownList;
comboBox1.Items.AddRange(new object[] {
    "One",
    "Two",
    "Three",
    "Four"});

回答5:

Try using a DropDownListbox

来源：https://stackoverflow.com/questions/162936/readonly-combobox-in-winforms