C＃データテーブルがセッションに保存されていません

Question

ヘッドメルトがあり、グリッドビューにバインドされる前のDatatableがセッションに保存されていないのはなぜですか？

常にnullです。

ここに私のコードです。 Session["Data"] = dts;にはデータが含まれている必要があります。しかし、私はあなたのコードは私のために正常に動作

protected void Page_Load(object sender, EventArgs e) 
{ 
    if (!IsPostBack) 
    { 
    PopulateProductClass(); 
    PopulateProduct();  
    } 
    PopulateOrderList();  
} 

private void PopulateOrderList() 
{ 
    DateTime d; 
    DateTime d2; 

    CustomerInfo ki = CustomerInfoProvider.GetCustomerInfoByUserID(CooneenHelper.GetUserImpersonisationID()); 
    int nKustomerID = ki.CustomerID; 
    DataTable dts = new DataTable(); 
    dts.Columns.Add("OrderDate", typeof(string)); 
    dts.Columns.Add("OrderNumber", typeof(string)); 
    dts.Columns.Add("OrderItemSKUName", typeof(string)); 
    dts.Columns.Add("SKUNumber", typeof(string)); 
    dts.Columns.Add("OrderItemStatus", typeof(string)); 
    dts.Columns.Add("OrderItemUnitCount", typeof(string)); 
    dts.Columns.Add("mtrx_Code2", typeof(string)); 

    QueryDataParameters qdp = new QueryDataParameters(); 
    qdp.Add("@CustomerID", nKustomerID); 

    if (drpProductClass.SelectedValue.ToString() != "0" || drpProductClass.SelectedValue.ToString() == null) { qdp.Add("@OrderItemWRClass", drpProductClass.SelectedItem.ToString()); } 
    if (drpProduct.SelectedValue.ToString() != "0") { qdp.Add("@OrderItemSKUID", drpProduct.SelectedValue.ToString()); }     
    if (txtStartDate.Text != "") { d = DateTime.Parse(txtStartDate.Text); qdp.Add("@OrderItemDateFrom", d.ToString("yyyy-MM-dd")); } 
    if (txtEndDate.Text != "") { d2 = DateTime.Parse(txtEndDate.Text); qdp.Add("@OrderItemDateTo", d2.ToString("yyyy-MM-dd")); } 

    DataSet ds = gc.ExecuteQuery("CN_GetOrderItemByCustID", qdp, QueryTypeEnum.StoredProcedure, true); 
    foreach (DataRow dr in ds.Tables[0].Rows) 
    { 
    DataRow drNew = dts.NewRow(); 
    drNew["OrderDate"] = ValidationHelper.GetDateTime(dr["OrderDate"], DateTime.Now).ToShortDateString(); 
    drNew["OrderNumber"] = dr["OrderNumber"].ToString(); 
    drNew["OrderItemSKUName"] = dr["OrderItemSKUName"].ToString(); 
    drNew["SKUNumber"] = dr["SKUNumber"].ToString(); 
    drNew["OrderItemStatus"] = dr["OrderItemStatus"].ToString(); 
    drNew["OrderItemUnitCount"] = dr["OrderItemUnitCount"].ToString(); 
    drNew["mtrx_Code2"] = dr["mtrx_Code2"].ToString(); 
    dts.Rows.Add(drNew); 
    } 

    //Clear the TextBox 
    litResults.Text = String.Empty; 

    if (dts.Rows.Count == 1) 
    litResults.Text = "" + dts.Rows.Count.ToString() + " Order Items"; 
    else 
    litResults.Text = "" + dts.Rows.Count.ToString() + " Order Items"; 

    gvOrderItems.Visible = true; 
    gvOrderItems.DataSource = dts.DefaultView;  
    gvOrderItems.DataBind(); 

    Session["Data"] = dts; 

    if (dts.Rows.Count > 1) litResults.Text += " - Showing page " + (gvOrderItems.PageIndex + 1).ToString() + " of " + gvOrderItems.PageCount.ToString(); 

} 

Answer 1

...

protected void Page_Load(object sender, EventArgs e) 
{ 
    PopulateOrderList(); 
} 

private void PopulateOrderList() 
{ 
    DateTime d; 
    DateTime d2; 
    DataTable dts = new DataTable(); 
    dts.Columns.Add("OrderDate", typeof(string)); 
    dts.Columns.Add("OrderNumber", typeof(string)); 
    dts.Columns.Add("OrderItemSKUName", typeof(string)); 
    dts.Columns.Add("SKUNumber", typeof(string)); 
    dts.Columns.Add("OrderItemStatus", typeof(string)); 
    dts.Columns.Add("OrderItemUnitCount", typeof(string)); 
    dts.Columns.Add("mtrx_Code2", typeof(string)); 

     DataRow drNew = dts.NewRow(); 
     drNew["OrderDate"] = DateTime.Now.ToShortDateString(); 
     drNew["OrderNumber"] = "122"; 
     drNew["OrderItemSKUName"] = "sku"; 
     drNew["SKUNumber"] = "skunum"; 
     drNew["OrderItemStatus"] = "Done"; 
     drNew["OrderItemUnitCount"] = "1290"; 
     drNew["mtrx_Code2"] ="abc123"; 
     dts.Rows.Add(drNew); 

    Session["Data"] = dts; 
    gridview.Visible = true; 
    gridview.DataSource = dts.DefaultView; 
    gridview.DataBind(); 


} 

protected void gridview_SortCommand(object source, DataGridSortCommandEventArgs e) 
{ 
    DataTable dt = (DataTable)Session["Data"]; 
}