ASP.NET显示渐变图片
最终效果:实现效果,首先准备一张图片,高度为25pixel,宽度为1至3pixel渐变的图片。可以这里下载/2012/0405/20120405091437570.gif 。
还要准备数据:
View Code
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,数据准备完了,在aspx里放三个Label控件,当然你可以显示在其它控件或是标签中,有一点要注意的是Width="300",它是渐变图片在100%的宽度。:
View Code
<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 />
把数据显示于Label上:
View Code
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 "<IMG height='21' src='images/bar.gif' width='" + width + "' align='absMiddle'> " + rate.ToString("p");
}
摘自 Insus.NET
补充:Web开发 , ASP.Net ,