ASP.NET显示渐变图片实现方法

 Dictionary Datas { get { Dictionary d = new Dictionary(); d.Add(1, 35); d.Add(2, 45); d.Add(3, 20); return d; } } 

 protected void Page_Load(object sender, EventArgs e) { Data_Binding(); } private void Data_Binding() { int totals = 100; foreach (KeyValuePair kvp in Datas) { double rate = kvp.Value / (double)totals; double width = rate * 300; switch (kvp.Key) { case 1: this.Label1.Text = GradientImage(width, rate); break; case 2: this.Label2.Text = GradientImage(width, rate); break; case 3: this.Label3.Text = GradientImage(width, rate); break; } } } private string GradientImage(double width, double rate) { return " " + rate.ToString("p"); }