如何在asp.net中动态添加页脚模板

Question

我已经动态地创建了一个gridview。设计部分描述了模板字段。所有的列都是通过后面的代码创建的，如下所示。它的工作很好。在这里我可以列出每一行的页面。但我不知道如何通过代码后面的页脚模板实现页面总和。

TemplateField Pages = new TemplateField(); 
Pages.HeaderText = "Pages"; 
Pages.ItemTemplate = new GridViewTemplate_Pages(); 
gv1.Columns.Add(Pages); 


    public class GridViewTemplate_Pages : ITemplate 
    { 

     void ITemplate.InstantiateIn(Control container) 
     { 
      Label PagesLabel = new Label(); 
      PagesLabel.DataBinding += new EventHandler(this.PagesLabel_DataBinding); 
      container.Controls.Add(PagesLabel); 
     } 

     void PagesLabel_DataBinding(object sender, EventArgs e) 
     { 
      Label lbl1 = (Label)sender; 
      GridViewRow row = (GridViewRow)lbl1.NamingContainer; 
      lbl1.Text = DataBinder.Eval(row.DataItem, "PagesReceived").ToString(); 
     } 
    } 

给定ShowFooter =“True”在aspx页面和RowDataBound分开书写。如果我在aspx页面中给出页脚模板但不知道如何以编程方式得到结果，下面的代码工作正常。请指教。

protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e) 
    { 
     if (e.Row.RowType == DataControlRowType.DataRow) 
     { 
      int RowTotalPages = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "PagesReceived")); 
      TotalPages = TotalPages + RowTotalPages; 
     } 
     if (e.Row.RowType == DataControlRowType.Footer) 
     { 
      Label m = (Label)e.Row.FindControl("gv1TotalPages"); 
      m.Text = TotalPages.ToString(); 
     } 
    } 

Answer 1

它是一个愚蠢的东西。我做得很复杂。我需要页脚行中的页面总和，那么为什么我应该考虑一下GridViewTemplate和Itemplate类。只需在会话中添加Total页面并在DataControlRowType.Footer中将其重新收录。这里是代码：

protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e) 
    { 
     if (e.Row.RowType == DataControlRowType.DataRow) 
     { 
      int RowTotalPages = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "PagesReceived")); 
      int RowTotalCharges = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "ChargesReceived")); 
      TotalPages = TotalPages + RowTotalPages; 
      TotalCharges = TotalCharges + RowTotalCharges; 
      Session.Add("TotalPages", TotalPages.ToString()); 
      Session.Add("TotalCharges", TotalCharges.ToString()); 
     } 
     if (e.Row.RowType == DataControlRowType.Footer) 
     { 
      e.Row.Cells[4].Text = "Batches Count: " + gv1.Rows.Count.ToString(); 
      e.Row.Cells[5].Text = Session["TotalPages"].ToString(); 
      e.Row.Cells[6].Text = Session["TotalCharges"].ToString(); 
     } 
    } 

Answer 2

您可以像这样创建页脚到gridview。

//代码

GridView gv = new GridView(); 
gv.RowCreated += delegate(object dsender, GridViewRowEventArgs ge) 
{ 
    if (ge.Row.RowType == DataControlRowType.Footer) 
     ge.Row.Cells[0].Text = "Something"; 
}; 
gv.AutoGenerateColumns = false; 
gv.ShowFooter = true; 
BoundField bf = new BoundField(); 
bf.HeaderText = "col 1"; 
bf.DataField = "Length"; 
gv.Columns.Add(bf); 
gv.DataSource = new string[] { "One", "Two", "Three" }; 
gv.DataBind(); 
Form.Controls.Add(gv); 

这是动态创建的GridView和页脚。你可以相应地改变。