gridview的連動式下拉選單

protected void ddlDepNum_1Level_DataBound(object sender, EventArgs e)

    {

        DropDownList ddl_tmp_dep = ((DropDownList)sender); //上層 部門資料

        DropDownList ddl_tmp_emp = ((DropDownList)sender).NamingContainer.FindControl("ddl_emp") as DropDownList; //下層 部門員工資料

        SqlDataSource SqlDataSource_emp = ((DropDownList)sender).NamingContainer.FindControl("sdsEmpNum") as SqlDataSource; //下層的datasource

        SqlDataSource_emp.SelectParameters["Dept"].DefaultValue = ddl_tmp_dep.SelectedValue; //上層的部門代碼參數

        ddl_tmp_emp.DataBind();

    }

 

 

在 ddlDepNum_1Level_SelectedIndexChanged() 事件也一併使用