problem giving backcolor of a mdi parent form

Question

1.00/5 (1 vote)

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C#

i m trying to give backcolor to a mdi parent form,but i can not see the effect.......plz help

Posted 27-Nov-11 2:06am

Himu from Orissa

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Comments

Mehdi Gholam 27-Nov-11 8:09am

What is your code?

3 solutions

Solution 3

An alternative:

C#

private void Form1_Load(object sender, EventArgs e)
{
    // store the result in a class-scoped variable
    // if you need to change the color again, or
    // whatever
    //
    // note that here we assume the Form IsMdiContainer property is 'true;
    // no checking that is true
    //
    this.Controls.OfType<MdiClient>().First().BackColor = Color.Red;
    //
    //
}

Posted 27-Nov-11 15:42pm

BillWoodruff

Updated 27-Nov-11 16:11pm

v4

Comments

LanFanNinja 29-Nov-11 11:08am

+5 I like this the best!

RaisKazi 30-Nov-11 3:14am

My 5.

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LanFanNinja · Accepted Answer · 2011-11-27T02:38:00

Solution 2

Try something like this

C#

foreach (Control c in this.Controls)
{
    if (c is MdiClient)
    {
        c.BackColor = Color.Blue;
        break;
    }
}

EDIT: Added "break;"

Posted 27-Nov-11 2:38am

LanFanNinja

Updated 27-Nov-11 3:33am

v2

Comments

Himu from Orissa 27-Nov-11 8:54am

working...... thanx

johannesnestler 27-Nov-11 15:22pm

break is important!

LanFanNinja 27-Nov-11 16:29pm

Indeed! :)

RaisKazi 30-Nov-11 3:14am

Voting 5 to counter that one Down-Vote.

LanFanNinja 30-Nov-11 15:31pm

Thank you!

OriginalGriff · Accepted Answer · 2011-11-27T02:36:00

Solution 1

This is not clear, or obvious, but...

C#

foreach (Control control in Controls)
    {
    MdiClient client = control as MdiClient;
    if (client != null)
        {
        client.BackColor = Color.Red;
        }
    }

Trust me - try it!

Posted 27-Nov-11 2:36am

OriginalGriff

Comments

Himu from Orissa 27-Nov-11 8:53am

thanx its working ,but why i need to do so?

LanFanNinja 27-Nov-11 9:07am

I honestly don't know if I have ever seen a clear explanation as to why this has to be done so I can't really say for sure but I think it is because an actual MdiClient control is added to your form so setting the BackColor of the form has no effect because it is covered up by the control. So we must set the color of the control instead. Also you can "break;" out of the loop once the BackColor has been set and save some processing time.

OriginalGriff 27-Nov-11 9:10am

Mostly because MS forgot that you might want to do this! :laugh:
When you create a MDI parent form, it gets a MDIClient which is basically the background. Since this is not given a name, you can't access it directly, and since it is not added at the top of the controls list, you have to go looking for it!

LanFanNinja 27-Nov-11 9:14am

Yes I think MS has alzheimer's! :)

LanFanNinja 27-Nov-11 9:09am

+5 OG for beating me to it! :)

johannesnestler 27-Nov-11 15:23pm

break...

OriginalGriff 27-Nov-11 15:34pm

You can indeed - but generally MDI Parent windows don't have a lot of controls, and you only do this infrequently, so it doesn't matter too much if you miss it out.

RaisKazi 30-Nov-11 3:14am

Voting 5 to counter that one Down-Vote.