C#

public bool IsNumeric(string s)<br />
		{<br />
			try<br />
			{<br />
				Int32.Parse(s);<br />
			}<br />
			catch<br />
			{<br />
				return false;<br />
			}<br />
			return true;<br />
		}<br />

David Anton wrote:

2. You don't want to do this in a KeyPress event since that won't handle pasting code from another source.

David Anton wrote:

Standard Windows copy/paste doesn't trigger KeyPress events.
User the TextChanged event to capture pasting of text also.

Suamal wrote:

CheckRegExPattern

Suamal wrote:

using System.Text.RegularExpressions;

public static bool CheckNumeric(string strText)
{
return CheckRegExPattern(@"^[0-9]+$", strText.Trim());
}

using System.Text.RegularExpressions;<br />
public bool CheckNumeric(string strtext)<br />
{<br />
  System.Text.RegularExpressions.Regex rr = new Regex(@"^[0-9]+$");<br />
  return rr.IsMatch(strtext);             <br />
}<br />
<br />
///In Button click event<br />
MessageBox.Show(this.CheckNumeric(TextBox1.Text).ToString());

public event SoloChangedHandler SoloChanged;             // Your event
public delegate void SoloChangedHandler(Channel sender);      // Your event delegate

private void OnSoloChanged()
{
     if (SoloChanged != null)
          SoloChanged(this);
}

private void chkSolo_Checked(object sender, EventArgs e)
{
     OnSoloChanged();   //Raise your event
}

public bool IsSolo
{
     get { return chkSolo.Checked; }
     set { chkSolo.Checked = value; }
}

private int selectedIndex = -1;
private Channel selectedChannel;

private void ctrlSolo_SoloChanged(Channel sender)
{
     if (sender.IsSolo)
     {
        this.selectedIndex = this.Controls.GetChildIndex(sender);
        this.selectedChannel = sender;
        foreach (Channel channel in this.Controls)
        {
             if (channel != sender)
             {
                 channel.IsSolo = false; //Or you can move this to the Channel control, set it to false whenever mute is true
                 channel.IsMute = true;
             }
        }
     }
     else
     {
        this.selectedIndex = -1;
        this.selectedChannel = null;
        foreach (Channel channel in this.Controls)
        {
            channel.IsSolo = false;
            channel.IsMute = false;
        }
     }
}