如何开发一个学生成绩管理糸统(8)

void searchOrders()
{
string Search_Str = Search_value.Text.ToString();
if (Search_Str != "")
{
DataView dv = new DataView();
DataTable dt = new DataTable();
switch (Search_style.SelectedValue.ToString())
{

case "1":
dt = CourseAPI.GetCourseByKname(Search_Str);
break;
case "2":
dt = CourseAPI.GetCourseByTerm(Search_Str);
break;
case "3":
dt = CourseAPI.GetCourseByKId(CString.TryToParse(Search_Str));
break;

}

dv = dt.DefaultView;
int Totalnum = dv.Count;
AspNetPager1.RecordCount = Totalnum;
TotalNum.Text = Totalnum.ToString();
PagedDataSource pds = new PagedDataSource();
pds.DataSource = dv;
pds.AllowPaging = true;
pds.CurrentPageIndex = AspNetPager1.CurrentPageIndex - 1;
pds.PageSize = AspNetPager1.PageSize;
Repeater1.DataSource = pds;
Repeater1.DataBind();
}
else
{
AlertMessage.showMsg(this, "请输入查询字符");
}
}

protected void Btn_Search_Click(object sender, EventArgs e)
{
searchOrders();
}

protected void Show_all_Click(object sender, EventArgs e)
{
bindData();
Search_value.Text = "";
AspNetPager1.CurrentPageIndex = 0;
}