setting Back color of a disabled combo to white color

hi I have a combo box which can enabled a开发者_开发知识库nd disabled at run time.now i needed to make make the back color constant even if it is enabled or disabled.any one can help me?

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I found following solutions.

Solution 1:

set the dropdownstyle to be "DropDownList" when disabled and then reset it to "DropDown" when you enabled the control

combobox.DropDownStyle = ComboBoxStyle.DropDownList;

Solution 2:

Go here http://www.codeproject.com/Articles/22454/ReadOnly-ComboBox

First solution work for me and 2nd solution u can try it.

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This worked for me

comboBox1.DropDownHeight = 1;
comboBox1.KeyDown += new KeyEventHandler(comboBox1_KeyDown);
comboBox1.KeyPress += new KeyPressEventHandler(comboBox1_KeyPress);
comboBox1.KeyUp += new KeyEventHandler(comboBox1_KeyUp);

Now in each of this handlers just set e.Handled = true

void comboBox1_KeyUp(object sender, KeyEventArgs e)
{
    e.Handled = true;
}

void comboBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    e.Handled = true;
}

void comboBox1_KeyDown(object sender, KeyEventArgs e)
{
    e.Handled = true;
}

Now when you have to function it as a Enabled just remove the handlers and set the DropDownHeight

comboBox1.KeyDown -= new KeyEventHandler(comboBox1_KeyDown);
comboBox1.KeyPress -= new KeyPressEventHandler(comboBox1_KeyPress);
comboBox1.KeyUp -= new KeyEventHandler(comboBox1_KeyUp);

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If this is WinForms then set the BackColor Property to whatever you want it to be.

As stated below this does NOT work.

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Depending on exactly what you are after, Googling has found me a potential solution:

If what you're after is to get the combobox in a disabled state (unchangable, but looking the same as when enabled), then quickly setting the Enabled property from true, to false, then back again on Enter achieves it, although in a somewhat hacky manner:

bool isDisabled = true;
private void comboBox1_Enter(object sender, EventArgs e)
{
    if(isDisabled)
    {
        comboBox1.Enabled = false;
        comboBox1.Enabled = true;
    }
}