因此，在文本框中，我将编写多少下拉列表，文本框，标签等以及页面ia AutoPostBack。但是当我在gridview上选择一个项目后，页面就会自动回复并且所有数据都消失了。我希望gridview成为AutoPostBack但是如何才能让它消除我从第一个文本框中添加的所有其他项目？
有关详细信息，请参阅源代码：
Default.aspx的
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css">
.auto-style1 {
width: 248px;
}
.auto-style2 {
width: 253px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<div>
<table style="width:100%;">
<tr>
<td class="auto-style2">
</td>
<td>
</td>
</tr>
<tr>
<td class="auto-style1"> </td>
<td class="auto-style2">
<asp:TextBox ID="TextBox1" runat="server" AutoPostBack="True" OnTextChanged="TextBox1_TextChanged"></asp:TextBox>
</td>
<td> </td>
</tr>
<tr>
<td class="auto-style1"> </td>
<td class="auto-style2">
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
</td>
<td> </td>
</tr>
<tr>
<td class="auto-style1"> </td>
<td class="auto-style2">
<asp:PlaceHolder ID="PlaceHolder2" runat="server"></asp:PlaceHolder>
</td>
<td> </td>
</tr>
<tr>
<td class="auto-style1"> </td>
<td class="auto-style2">
<asp:PlaceHolder ID="PlaceHolder3" runat="server"></asp:PlaceHolder>
</td>
<td> </td>
</tr>
<tr>
<td class="auto-style1"> </td>
<td class="auto-style2">
<asp:PlaceHolder ID="PlaceHolder4" runat="server"></asp:PlaceHolder>
</td>
<td> </td>
</tr>
<tr>
<td class="auto-style1"> </td>
<td class="auto-style2">
<asp:PlaceHolder ID="PlaceHolder5" runat="server"></asp:PlaceHolder>
</td>
<td> </td>
</tr>
<tr>
<td class="auto-style1"> </td>
<td class="auto-style2">
</td>
<td> </td>
</tr>
</table>
<br />
</div>
</form>
</body>
</html>
和Default.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
public partial class Default2 : System.Web.UI.Page
{
DropDownList artikulli;
TextBox cmimi;
Label tregoCmimi;
TextBox sasia;
Label cmimiGjithsej;
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
}
}
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(TextBox1.Text))
{
int a = int.Parse(TextBox1.Text);
for (int j = 1; j <= a; j++)
{
Guid IDUnik = new Guid();
artikulli = new DropDownList();
cmimi = new TextBox();
tregoCmimi = new Label();
sasia = new TextBox();
cmimiGjithsej = new Label();
artikulli.ID = j.ToString(IDUnik.ToString("N").Substring(31));
artikulli.AutoPostBack = true;
cmimi.ID = j.ToString(IDUnik.ToString("D").Substring(30));
tregoCmimi.ID = j.ToString(IDUnik.ToString("P"));
sasia.ID = j.ToString(j.ToString(IDUnik.ToString("X")));
cmimiGjithsej.ID = j.ToString(j.ToString(IDUnik.ToString("B"))); ;
PlaceHolder1.Controls.Add(artikulli);
PlaceHolder2.Controls.Add(cmimi);
PlaceHolder3.Controls.Add(tregoCmimi);
PlaceHolder4.Controls.Add(sasia);
PlaceHolder5.Controls.Add(cmimiGjithsej);
artikulli.Items.Insert(0, new ListItem("<Select Subject>", "0"));
artikulli.Items.Insert(1, new ListItem("<Select Subject>", "1"));
}
}
}
}
答案 0 :(得分：0)
你可以这样做
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
AddItems();
}
}
private void AddItems()
{
if (!string.IsNullOrEmpty(TextBox1.Text))
{
int a = int.Parse(TextBox1.Text);
for (int j = 1; j <= a; j++)
{
Guid IDUnik = new Guid();
artikulli = new DropDownList();
cmimi = new TextBox();
tregoCmimi = new Label();
sasia = new TextBox();
cmimiGjithsej = new Label();
artikulli.ID = j.ToString(IDUnik.ToString("N").Substring(31));
artikulli.AutoPostBack = true;
cmimi.ID = j.ToString(IDUnik.ToString("D").Substring(30));
tregoCmimi.ID = j.ToString(IDUnik.ToString("P"));
sasia.ID = j.ToString(j.ToString(IDUnik.ToString("X")));
cmimiGjithsej.ID = j.ToString(j.ToString(IDUnik.ToString("B"))); ;
PlaceHolder1.Controls.Add(artikulli);
PlaceHolder2.Controls.Add(cmimi);
PlaceHolder3.Controls.Add(tregoCmimi);
PlaceHolder4.Controls.Add(sasia);
PlaceHolder5.Controls.Add(cmimiGjithsej);
artikulli.Items.Insert(0, new ListItem("<Select Subject>", "0"));
artikulli.Items.Insert(1, new ListItem("<Select Subject>", "1"));
}
}
}
您的文本框中不需要OnTextChanged="TextBox1_TextChanged"
答案 1 :(得分：0)
protected void Page_Load(object sender, EventArgs e)
{
if (Page.IsPostBack)
{
Populate();
}
}
protected void TextBox1_TextChanged(object sender, EventArgs e)
{
Populate();
}
void Populate()
{
PlaceHolder1.Controls.Clear();
PlaceHolder2.Controls.Clear();
PlaceHolder3.Controls.Clear();
PlaceHolder4.Controls.Clear();
PlaceHolder5.Controls.Clear();
if (!string.IsNullOrEmpty(TextBox1.Text))
{
int a = int.Parse(TextBox1.Text);
for (int j = 1; j <= a; j++)
{
Guid IDUnik = new Guid();
artikulli = new DropDownList();
cmimi = new TextBox();
tregoCmimi = new Label();
sasia = new TextBox();
cmimiGjithsej = new Label();
artikulli.ID = j.ToString(IDUnik.ToString("N").Substring(31));
artikulli.AutoPostBack = true;
cmimi.ID = j.ToString(IDUnik.ToString("D").Substring(30));
tregoCmimi.ID = j.ToString(IDUnik.ToString("P"));
sasia.ID = j.ToString(j.ToString(IDUnik.ToString("X")));
cmimiGjithsej.ID = j.ToString(j.ToString(IDUnik.ToString("B"))); ;
PlaceHolder1.Controls.Add(artikulli);
PlaceHolder2.Controls.Add(cmimi);
PlaceHolder3.Controls.Add(tregoCmimi);
PlaceHolder4.Controls.Add(sasia);
PlaceHolder5.Controls.Add(cmimiGjithsej);
artikulli.Items.Insert(0, new ListItem("<Select Subject>", "0"));
artikulli.Items.Insert(1, new ListItem("<Select Subject>", "1"));
}
}
}