更改不使用click at事件的动态创建按钮的颜色

Question

I have added buttons to a grid layout I created. Here is the code for that.

        int nodeIndex = 0;

        for (i = 0; i < usedRows; i++)
        {
            for (j = 0; j < cols; j++)
            {
                this.tableLayoutPanel1.Controls.Add(nodes[nodeIndex++], j, i);
            }
        }

Later on in the application I want to be able to change the color of a button at a specified position. Basically change the back round color of the button at position i,j. How would I get access to that specific button? I am using winforms. Is there something like

button = this.tableLayoutPanel1.Controls.GetChildAtPosition(j, i)

Answer 1

You can use something along these lines.

button = this.tableLayoutPanel1.GetControlFromPosition(j, i);
button.BackColor = Color.BLACK; 

Answer 2

So first you want to able to find the control and conveniently there is a method called FindControl() that can do just that

MSDN link for reference: http://msdn.microsoft.com/en-us/library/system.web.ui.control.findcontrol(v=vs.110).aspx

Second you want to be able to change the color of the button once you find it.

For buttons you probably want to use the BackColor property.

Again MSDN link for reference: http://msdn.microsoft.com/en-us/library/system.windows.forms.control.backcolor(v=vs.110).aspx

The trick is going to be finding the control and then working with that control as an object to change the color. Don't forget that you can cast the control to a button type once you find it, which should give you access to the BackColor property.