我有2页（Trial.aspx和TestCallBack.aspx）。 Trail.aspx将首先是可编辑模式。现在从TestCallBack.aspx我将重定向回Trail.aspx但所有控件应该是只读格式。我在下面给出了源代码的详细信息。只有trial.aspx的文本框是只读的，根本看不到gridview。
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Trial.aspx.cs" Inherits="PTest.Trial" EnableEventValidation ="true" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txtVisitor" runat="server"></asp:TextBox>
<asp:GridView ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false" ShowHeaderWhenEmpty ="true" Visible ="true">
<Columns>
<asp:BoundField DataField="RowNumber" HeaderText="Row Number" />
<asp:TemplateField HeaderText="Header 1">
<ItemTemplate>
<asp:TextBox ID="txtDate" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Header 2">
<ItemTemplate>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Header 3">
<ItemTemplate>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
</ItemTemplate>
<FooterStyle HorizontalAlign="Right" />
<FooterTemplate>
<asp:Button ID="ButtonAdd" runat="server" Text="Add New Row" OnClick="ButtonAdd_Click" />
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
namespace PTest
{
public partial class Trial : System.Web.UI.Page
{
private void SetInitialRow()
{
DataTable dt = new DataTable();
DataRow dr = null;
dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
dt.Columns.Add(new DataColumn("Column1", typeof(string)));
dt.Columns.Add(new DataColumn("Column2", typeof(string)));
dt.Columns.Add(new DataColumn("Column3", typeof(string)));
dr = dt.NewRow();
dr["RowNumber"] = 1;
dr["Column1"] = string.Empty;
dr["Column2"] = string.Empty;
dr["Column3"] = string.Empty;
dt.Rows.Add(dr);
//Store the DataTable in ViewState
ViewState["CurrentTable"] = dt;
Gridview1.DataSource = dt;
Gridview1.DataBind();
}
private void AddNewRowToGrid()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the TextBox values
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("txtDate");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumber"] = i + 1;
dtCurrentTable.Rows[i - 1]["Column1"] = box1.Text;
dtCurrentTable.Rows[i - 1]["Column2"] = box2.Text;
dtCurrentTable.Rows[i - 1]["Column3"] = box3.Text;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTable"] = dtCurrentTable;
Gridview1.DataSource = dtCurrentTable;
Gridview1.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
//Set Previous Data on Postbacks
SetPreviousData();
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("txtDate");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[2].FindControl("TextBox2");
TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].Cells[3].FindControl("TextBox3");
box1.Text = dt.Rows[i]["Column1"].ToString();
box2.Text = dt.Rows[i]["Column2"].ToString();
box3.Text = dt.Rows[i]["Column3"].ToString();
rowIndex++;
}
}
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
string name = Request.QueryString["value"];
if (name == "true")
{
hidecontrols();
}
else
{
SetInitialRow();
}
}
}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
AddNewRowToGrid();
}
protected void hidecontrols()
{
foreach (Control c in Page.Controls)
{
if (c is GridView)
((GridView)(c)).Enabled = false;
foreach (Control ctrl in c.Controls)
{
if (ctrl is TextBox)
{
((TextBox)(ctrl)).Enabled = false;
}
else if (ctrl in GridView)
{
((GridView)(ctrl).Enabled =false;
}
}
}
}
}
}
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="TestCallBack.aspx.cs" Inherits="PTest.TestCallBack" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
</div>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace PTest
{
public partial class TestCallBack : System.Web.UI.Page
{
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("Trial.aspx?value=true");
}
}
}
答案 0 :(得分：0)
阅读完评论后，您的问题就会出现在这里：
if (!Page.IsPostBack)
{
string name = Request.QueryString["value"];
if (name == "true")
{
hidecontrols();
}
else
{
SetInitialRow();
}
}
你基本上是在说如果这个页面不是postback然后执行这个IF语句 - 然后在IF语句中你说如果有一个qstring值隐藏控件。由于您重定向回到此页面，因此它不会是回发，因为您将有一个qstring value，它将隐藏控件。
也许尝试这样的事情：
SetInitialRow();
if (!Page.IsPostBack)
{
string name = Request.QueryString["value"];
if (name == "true")
{
GridView1.ShowFooter = false;
}
else
{
GridView1.ShowFooter = true;
}
}
不确定这是否是您实际使用的内容，但问题出在您的网页加载中的if-else。也许如果你用你想要的实际流量更新你的Q;它会帮助我们更多地帮助你。