Question

I have a method to get a random color:

 private System.Drawing.Color GetRandColor()
    {
        Random r = new Random(DateTime.Now.Millisecond);

        System.Drawing.Color[] colours = 
        {
            System.Drawing.Color.Yellow, 
            System.Drawing.Color.LightGreen, 
            System.Drawing.Color.LightCyan,
            System.Drawing.Color.LightSalmon,  
            System.Drawing.Color.LightSkyBlue
        };

        int i = r.Next(0, colours.Length - 1);

        System.Drawing.Color c = colours[i];

        return c; 
    }

So what I want to do, is to have this random color passed into my html when the page loads.
So it will be put in Page_Load somehow:

 protected void Page_Load(object sender, EventArgs e)
    {
              // code to set button color 
    } 

<asp:Button ID="Button1" runat="server" Text="Button" BackColor=GetRandColor()/>

Answer 1

You can change the background color of button in C# code itself. Please check the method.

private void GetRandColor()
    {
        Random r = new Random(DateTime.Now.Millisecond);

        System.Drawing.Color[] colours = 
        {
            System.Drawing.Color.Yellow, 
            System.Drawing.Color.LightGreen, 
            System.Drawing.Color.LightCyan,
            System.Drawing.Color.LightSalmon,  
            System.Drawing.Color.LightSkyBlue
        };

        int i = r.Next(0, colours.Length - 1);

        System.Drawing.Color c = colours[i];

        Button1.BackColor = c;
    }