C#

public static Image SetImageOpacity(Image image, float opacity)
{
     Bitmap bitmap = new Bitmap(image.Width, image.Height); 
     using (Graphics g = Graphics.FromImage(bitmap)) 
     {
          // The followine statement was absent originally.
          g.FillRegion(new SolidBrush(SystemColors.Window), new Region(new Rectangle(0, 0, image.Width, image.Height)));
          ColorMatrix matrix = new ColorMatrix();
          matrix.Matrix33 = opacity; 
          ImageAttributes attributes = new ImageAttributes(); 
          attributes.SetColorMatrix(matrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); 
          g.DrawImage(image, new Rectangle(0, 0, bitmap.Width, bitmap.Height), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, attributes); 
     } 
     return bitmap; 
}

anishkannan wrote:

I thing, ManualResentEvent or AutoResendEvent are used in ur application.
but u r not handle write.This is my assumption.

public void FillCombo()
{
   DataTable dt = new DataTable();
   StrSql = "select Level_Id,Level_Name from UserLevel";
   StrSql += " where Level_Id = '2'";
   dt = qry.FillDataSet(StrSql).Tables[0];
   if (dt.Rows.Count > 0)
   {
      MessageBox.Show("More than one row");
   }
   AddChildCombo(2, ref dt);
   this.cmbParentLevel.DataSource = dt;
   this.cmbParentLevel.DisplayMember = "Level_Name";
   this.cmbParentLevel.ValueMember = "Level_Id"; 
}

private void AddChildCombo(int objid,ref DataTable Table)
{
   DataTable Objdt; 
   int Objval; 
   StrSql = "select Level_Id,Level_Name from UserLevel";
   StrSql += " where Parent_LevelId = " + objid + "";
   Objdt = qry.FillDataSet(StrSql).Tables[0];
   for ( int i = 0; i <= Objdt.Rows.Count - 1; i++)
   { 
      Table.ImportRow(Objdt.Rows[i]); 
      Objval = Convert.ToInt32(Objdt.Rows[i].ItemArray[0]);
      AddChildCombo(Objval, ref Objdt);
   }
}