c# - GridView ButtonField 单击是否会导致回发？

Question

我在使用 ButtonField 发出行命令时遇到问题。

当我单击 ButtonField 中的 ImageButton 时，IsPostBack 为 false

我的理解是 GridView 的 ButtonField 中的 ImageButton 应该导致回传为真。

问题:有人可以解释我是对还是错，以及是否有属性要设置在按钮字段上以使其发出回发。

部分代码:

Page_Load(object sender, EventArgs e) 
{
    if (!IsPostBack)
    {
        m_DataTable = GetDataTable();      
        Session["m_DataTable"] = m_DataTable;
    }
    else
    {
        m_DataTable = Session["m_DataTable"];
    }
}

和后面的代码:

GridView1.Columns.Clear();

ButtonField cf = new ButtonField();
cf.HeaderStyle.CssClass = "comGridHeadCell";
cf.HeaderText = "some text";
cf.HeaderImageUrl = "images/something.png";
cf.Text = "action";
cf.CommandName = "action";
cf.ImageUrl = "images/something.png";
cf.ButtonType = ButtonType.Image;
cf.ItemStyle.CssClass = "comGridLink";

GridView1.Columns.Add(cf);

GridView1.DataSource = m_DataTable;
GridView1.DataBind();

还有:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" AllowPaging="True" AllowSorting="True"  OnRowCommand="GridView_RowCommand" OnPageIndexChanging="GridView_PageIndexChanging">
  <PagerSettings PageButtonCount="25" />
</asp:GridView>

---

编辑:我正在通过 VS2010 以 Debug模式运行站点。我正在使用 IE8 进行测试。如果我使用 firefox，IsPostBack == true。这看起来像是在 IE8 中调试时的一个特定问题。

Answer 1

您是否在每次加载时都创建该列？

以下命令按预期触发 RowCommand，IsPostBack 按预期为真。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Diagnostics;
using System.Data;

namespace WebApplication2
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                Debugger.Break();
            }
            else
            {
                Debugger.Break();
            }

            DataTable oDataTable = new DataTable();
            oDataTable.Columns.Add("animal");
            DataRow oDataRow = oDataTable.NewRow();
            oDataRow["animal"] = "cat";
            oDataTable.Rows.Add(oDataRow);

            GridView1.Columns.Clear();

            ButtonField cf = new ButtonField();
            cf.HeaderStyle.CssClass = "comGridHeadCell";
            cf.HeaderText = "some text";
            cf.HeaderImageUrl = "images/something.png";
            cf.Text = "action";
            cf.CommandName = "action";
            cf.ImageUrl = "images/something.png";
            cf.ButtonType = ButtonType.Image;
            cf.ItemStyle.CssClass = "comGridLink";

            GridView1.Columns.Add(cf);

            GridView1.DataSource = oDataTable;
            GridView1.DataBind();
        }


        protected void GridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {

        }

        protected void GridView_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            Debugger.Break();
        }
    }
}