如何使用基于单元格值的颜色设置Asp.net GridView单元格的样式

Question

我有一个Gridview,它有一个名为的列student_Class.网格视图上有大约80个Class.我使用GroupBy查询对此类进行了分组.

现在我想用不同的颜色设计这个不同的类.这怎么可能？
写上所有课程RowDataBound并给出颜色并不容易.

还有其他方法吗？

码:

groups = (ArrayList)Session["selectedclass"];
SELECT id,name,student_Class FROM student where 
         student_Class='"+groups[0].ToString().Trim()+"'  
         group by  student_Class.

提供数据

 id   name   student_class
 1    aa      A
 2    bb      A
 3    cc      A
 4    dd      B
 5    ee      B
 6    as      B
 7    ss      B
 8    AZZ     D

有价值的学生班 A需要相同的颜色(单元格),B需要其他颜色等.

Answer 1

ASPX:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
    DataKeyNames="id" DataSourceID="SqlDataSource1" 
    ondatabound="GridView1_DataBound" onrowdatabound="GridView1_RowDataBound">
    <Columns>
        <asp:BoundField DataField="id" HeaderText="id" ReadOnly="True" 
            SortExpression="id" />
        <asp:BoundField DataField="name" HeaderText="name" SortExpression="name" />
        <asp:BoundField DataField="student_class" HeaderText="student_class" 
            SortExpression="student_class" />
    </Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
    ConnectionString="<%$ ConnectionStrings:SiteConnectionString %>" 
    SelectCommand="SELECT * FROM [student]">
 </asp:SqlDataSource>

代码背后:

static string[,] ClassNames =
{
   {"A","Red"},
   {"B","Blue"},
   {"C","Pink"},
   {"D","Green"},
   // and so on
};
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    string className = e.Row.Cells[2].Text;
    string color = "Black";
    for (int i = 0; i <= ClassNames.GetUpperBound(0); i++)
    {
        if (ClassNames[i, 0] == className)
        {
            color = ClassNames[i, 1];
            e.Row.Cells[2].ForeColor = Color.FromName(color);
            e.Row.Cells[2].BorderColor = Color.Black;
            break;
        }
    }
}