CODEWITHSUNDEEP
c#visual-studio-2013
Daniel Turner
Daniel Turner

Reputation: 139

when i try to move my picture with.Bottom keep getting error but i can move it with.Left and .Top

in Microsoft windows visual c# windows form application I keep getting this error message.

Error 1 Property or indexer 'System.Windows.Forms.Control.Bottom' cannot be assigned to -- it is read only

I can move the image with a int Control.Left or a Top but not a Bottom or Right what wrong with it

private void button1_Click(object sender, EventArgs e)
        {
            pictureBox1.Bottom += 1;

        }

Upvotes: 1

Views: 985

Answers (5)

Demon Guru
Demon Guru

Reputation: 1

    [Read my Blog Techhowdy][1]
// For right 
                pictureBox1.Top = ((Control)sender).Top;
                pictureBox1.Height = ((Control)sender).Height;
    // For bottom
                 pictureBox1.Left = ((Control)sender).Left;
                 pictureBox1.Width= ((Control)sender).Width;
    // For top
                 pictureBox1.Top= ((Control)sender).Top;
                 pictureBox1.Width = ((Control)sender).Width;

    // Casting it to Control will solve your problem - use Left as it can be manupilated


  [1]: http://techhowdy.com

Upvotes: 0

Sergey Berezovskiy
Sergey Berezovskiy

Reputation: 236248

As error says, you cannot assign Bottom property - its calculated based on control size and location:

public int Bottom
{
    get { return this.y + this.height; }
}

And its for reading only. On the other hand, Left and Top will change bounds of control by changing it's x or y position:

public int Left
{
    get { return this.x; }
    set
    {
        SetBounds(value, this.y, this.width, this.height, BoundsSpecified.X);
    }
}

Upvotes: 0

Bart
Bart

Reputation: 294

Bottom property is read only (as Right is). You can however manipulate it's value indirectly by changing values of Top or Size properties.

Upvotes: 1

Adriaan Stander
Adriaan Stander

Reputation: 166406

From Control.Bottom Property

The value of this property is equal to the sum of the Top property value, and the Height property value.

The Bottom property is a read-only property. You can manipulate this property value by changing the value of the Top or Height properties or calling the SetBounds, SetBoundsCore, UpdateBounds, or SetClientSizeCore methods.

Upvotes: 1

Kjartan
Kjartan

Reputation: 19111

Presumably your picture is a square, meaning you should easily be able to calculate the required Top and Left positions from the Bottom and Right you would like, together with the height and width of the picture.

Do that instead, and just use Top and Left.

Upvotes: 0

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