Question

我正在添加动态控件（文本框），我将属性设置为visible = false，但我没有在树集合中找到控件，我想将其隐藏在用户看到它并读取值。

protected void gv_RowCreated(object sender, GridViewRowEventArgs e)
    {
       Students org = (namespace.Students )(e.Row.DataItem);

       foreach (Registration reg in org.Registrations)
       {
          int _count = org.Registrations.Count;
          for (int rowId = 0; rowId < _count; rowId++)
          {
             TextBox txtBox = new TextBox();
             txtBox.ID = "_registration" + e.Row.RowIndex + "_" + rowId;
             txtBox.Text = reg.Name;
             txtBox.Visible = true;
             e.Row.Cells[7].Controls.Add(txtBox);
         }
       }
    }

Answer 1

由于您正在org.Registrations上创建TextBoxes，因此您可以在GirdVIew的ItemTemplate中使用Repeater，然后将org.Registrations作为DataSource绑定到RowCreated事件中的转发器。即：你的aspx中的：

<asp:GridView ...... OnRowDataBound="gv_RowDataBound">
.
.
.
    <asp:TemplateField ...>
        <ItemTemplate>
            <asp:Repeater id="rptRegistrations" runat="server">
                <asp:TextBox id="txtRegistration" runat="server" Text='<%#Eval("Name")%>'></asp:TextBox><br/>
            </asp:Repeater>
        </ItemTemplate>
    </asp:TemplateField ...>
</asp:GridView>

您的代码

中的

      protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)     
        {        
         if(e.Row.RowType == DataControlRowType.DataRow)
    {
             Students org = (namespace.Students )(e.Row.DataItem);         
             Repeater rptrRegistrations = e.Row.Cells[7].FindControl("rptrRegistrations") as Repeater ;
             rptrRegistrations.DataSource = org.Registrations;
             rptrRegistrations.DataBind();
         } 
        }

 public void gv_SelectedIndexChanged(Object sender, EventArgs e)
  {

    // Get the currently selected row using the SelectedRow property.
    GridViewRow row = gvOrg.SelectedRow;
        Repeater rptrRegistrations = row.Cells[7].FindControl("rptrRegistrations") as Repeater;
        foreach(RepeaterItem item in rptrRegistrations.Items)
        {
            TextBox txtRegistration = item.FindControl("txtRegistration") as TextBox;
            //Now you have access to the textbox.
        }
  }

根据OP的评论忽略以下文字

不是动态创建TextBox，而是在ASPX中的Grid ItemTemplate中添加Textbox，然后使用e.Row.Cells.FindControl访问文本框。类似的东西：

protected void gv_RowCreated(object sender, GridViewRowEventArgs e) { Students org = (namespace.Students )(e.Row.DataItem); foreach (Registration reg in org.Registrations) { int _count = org.Registrations.Count; for (int rowId = 0; rowId < _count; rowId++) { TextBox txtBox = e.Row.Cells[7].FindControl("txtRegistration") as TextBox ; //txtBox.ID = "_registration" + e.Row.RowIndex + "_" + rowId; txtBox.Text = reg.Name; txtBox.Visible = true; //e.Row.Cells[7].Controls.Add(txtBox); } } }

Answer 2

我相信将Visible =“false”放到控件上并停止渲染到浏览器，所以不会，你找不到它。

相反，您可以尝试使用HtmlInputHidden控件，它将生成一个隐藏的输入字段。

隐藏字段不是一种很好的处理方式，因为它们可以使用各种拦截工具在客户端轻松修改。

Answer 3

如果可见为false，则不会将其呈现给页面。您也可以使用HTMLInputHidden控件。

在集合树中查找控件

3 个答案: