asp.net中用dropdownList实现查询功能代码

string stype = ddlType.SelectedItem.Text;

string strsql = "";

switch (stype)

{

case "学号":

strsql = "select * from tb_Student where StudentNum like '%" + txtKey.Text.Trim() + "%'";

BaseClass.BindDG(gvStuInfo, "ID", strsql, "stuinfo"); ;

break;

case "姓名":

strsql = "select * from tb_Student where StudentName like '%" + txtKey.Text.Trim() + "%'";

BaseClass.BindDG(gvStuInfo, "ID", strsql, "stuinfo");

break;

}