C# 从静态方法调用非静态方法并绑定GridView
嗨,我的静态方法是C# 从静态方法调用非静态方法并绑定GridView,c#,asp.net,C#,Asp.net,嗨,我的静态方法是 [WebMethod(EnableSession = true)] public static List<Entity.Report> ChartNavigation(string type, string user, string date) { WebForm2 objForm = new WebForm2(); objForm.BindCVTrackerForNavigation(user, date);
[WebMethod(EnableSession = true)]
public static List<Entity.Report> ChartNavigation(string type, string user, string date)
{
WebForm2 objForm = new WebForm2();
objForm.BindCVTrackerForNavigation(user, date);
List<Entity.Report> listchart = new List<Entity.Report>();
using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["Recruitment"].ConnectionString))
{
string sqlString = "GetNumberOfCVSentForChartNavigation";
using (SqlCommand cmd = new SqlCommand(sqlString, conn))
{
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@UserName", user.Replace("\"", "")));
cmd.Parameters.Add(new SqlParameter("@Date", date.Replace("\"", "")));
conn.Open();
SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while (rdr.Read())
{
Entity.Report obj = new Entity.Report();
Utilities.Common.Fill(obj, rdr);
listchart.Add(obj);
}
conn.Close();
}
}
return listchart;
}
当数据源应用于
gvCVTracker
时,它抛出错误对象引用未设置为对象的实例。
我不知道问题出在哪里?任何帮助都将不胜感激。谢谢。您必须使用Page.LoadControl创建WebForm2的实例,以便它也可以处理控件的初始化。什么是gvCVTracker
?@Andrei它是GridViewId何时调用此非静态方法?你确定GridView是在那时创建的吗?实际上,试着调试代码,当抛出异常时,您将能够准确地看到什么是空的。当抛出异常时,您可以看到innerexception吗?你能发布那个吗?@Andrei我已经调试了我的代码。当调用非静态方法时,网格视图为空。
protected void BindCVTrackerForNavigation(string User,string Date)
{
DataSet ds = new DataSet();
using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["Recruitment"].ConnectionString))
{
string sqlString = "GetNumberOfCVSentForNavigation";
using (SqlCommand cmd = new SqlCommand(sqlString, conn))
{
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("@UserName", User.Replace("\"", "")));
cmd.Parameters.Add(new SqlParameter("@Date", Date.Replace("\"", "")));
conn.Open();
SqlDataAdapter DA1 = new SqlDataAdapter(cmd);
DA1.Fill(ds);
conn.Close();
}
if (ds.Tables.Count > 0)
{
if (ds.Tables[0].Rows.Count > 0)
{
gvCVTracker.DataSource = ds.Tables[0];
gvCVTracker.DataBind();
}
}
}
}