How to Implement ASP. NET to display gradient Images,

How to Implement ASP. NET to display gradient Images,

First, let's get the final result:

To achieve the effect, first prepare an image with a height of 25 pixel and a gradient of 1 to 3 pixel. You can download it here.

Prepare the data as follows:

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

OK, the data is ready. put three Label controls in aspx. Of course, you can display them in other controls or labels. Note that Width = "300 ", it is the gradient image width at 100%:

<asp:Label ID="Label1" runat="server" style="margin: 3px;" Text="" Width="300" BorderWidth="1"></asp:Label><br />  <asp:Label ID="Label2" runat="server" style="margin: 3px;" Text="" Width="300" BorderWidth="1"></asp:Label><br />  <asp:Label ID="Label3" runat="server" style="margin: 3px;" Text="" Width="300" BorderWidth="1"></asp:Label><br /> 

Display the data on the Label:

protected void Page_Load(object sender, EventArgs e)  {  Data_Binding();  }   private void Data_Binding()  {  int totals = 100;  foreach (KeyValuePair<int, int> 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");  } 

The above is how ASP. NET implements gradient images, hoping to help you learn.