在Grid View下保留以前的数据 [英] Hold Previous data under Grid View
本文介绍了在Grid View下保留以前的数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
大家好，
i有一个文本框和一个GridView，
如果我第一次输入rollno，显示在相关的GridView中，这是第一次正确的工作。但是如果第二次和第三次不同的rollno输入文本框，那么我想在网格中保留以前的数据（所有数据第1到第3）。
我如何保存网格中的所有数据？
请帮助我。
Hi ALL,
i have one textbox and one GridView,
here if i have enter rollno 1st time, display in related GridView, here 1st time proper work. But if 2nd time and 3rd Time Different rollno Entered textbox, Then i Want Hold Previous Data in Grid(All Data 1st to 3rd).
How i Hold All Data in Grid??
Please Help Me.
推荐答案
It seems that as your page is being refreshed so you lose previous data .
You can use asp:UpdatePanel and ViewState to hold previous data and place a asyn triggger for insert button event.
Here is a your solution
In .Aspx
In .Aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication8._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div><asp:ScriptManager runat="server"></asp:ScriptManager>
<asp:TextBox ID="txtRoll" runat="server" ></asp:TextBox>
<asp:Button ID="btnAdd" runat="server" Text="Push" OnClick="btnAdd_Click" />
<asp:UpdatePanel ID="up" runat="server">
<ContentTemplate>
<asp:gridview ID="Gridview1" runat="server"></asp:gridview>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnAdd" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
代码落后
Code behind
public List<string> alstroll;
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
alstroll = new List<string>();
ViewState["RollList"] = alstroll;
}
else
alstroll = (List<string>)ViewState["RollList"];
Gridview1.DataSource = alstroll;
Gridview1.DataBind();
}
protected void btnAdd_Click(object sender,EventArgs e)
{
if (txtRoll.Text != null)
{
alstroll.Add(txtRoll.Text);
ViewState["RollList"] = alstroll;
Gridview1.DataBind();
}
}
这篇关于在Grid View下保留以前的数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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