Question

我想从循环内更新Asp.Net中我的文本框控件的text属性。我尝试使用带有计时器控件的Ajax updatepanel但无法更新文本属性。我自上周以来一直在搜索这个但是无法访问找到任何答案任何帮助将非常感激

以下是详细信息：

这是我在此代码中的按钮点击事件，您可以看到我正在更新

TxtContent.Text

在循环内，文本由名为

的用户定义函数返回

ReturnBodyText()

之后我将文本分配给viewstate，以便在计时器tick事件中我可以调用文本并更新textbox文本属性，然后在timer tick事件中将viewstate值分配给文本框。

protected void Button4_Click(object sender, EventArgs e)
{
    ArrayList FilePath = (ArrayList)ViewState["ArrayList"];
    int i = 0;
    int b = 1;
    foreach(string[] sr in FilePath)
    {
        string Month = sr[i];
        string datewithzero;
        datewithzero = String.Format("{0:00}", b);
        string[] FilesArray = (string[])listfiles(Month, datewithzero).ToArray(typeof(string));

        foreach (string FileNameWithExtension in FilesArray)
        {
            ListBox4.Items.Add(FileNameWithExtension);
            TxtContent.Text = ReturnBodyText(Month, datewithzero, FileNameWithExtension);
            ViewState["Content"] = TxtContent.Text;
            Timer1.Enabled = true;
            Timer1_Tick(ViewState["Content"], e);
        }
        i = i + 1;
        b = b + 1;
    }
}

protected void Timer1_Tick(object sender, EventArgs e)
{
    TxtContent.Text =(string) ViewState["Content"];
    TxtContent.DataBind();
}

我希望上面的描述可以帮助你们理解我的问题

完整的aspx文件和后面的代码如下：

Aspx代码：

＆lt;％@ Page Language =“C＃”AutoEventWireup =“true”CodeFile =“Default.aspx.cs”Inherits =“_ Default”％＆gt;

＆lt;％@ Register assembly =“AjaxControlToolkit”namespace =“AjaxControlToolkit”tagprefix =“asp”％＆gt;

    <asp:ListBox ID="ListBox1" runat="server" Height="509px" Width="59px">
    </asp:ListBox>

    <asp:Button ID="Button2" runat="server" Height="26px" onclick="Button2_Click" 
        Text="To be pressed first" Width="130px" />

    <asp:Button ID="Button3" runat="server" onclick="Button3_Click" 
        Text="To be pressed 2nd" Width="131px" Height="26px" />

    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>

            <asp:Timer ID="Timer1" runat="server" Interval="1000" 
        ontick="Timer1_Tick" Enabled="False">
            </asp:Timer>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
        <ContentTemplate>
            <asp:TextBox ID="TxtContent" runat="server" Height="508px" AutoPostBack="True" 
                TextMode="MultiLine"></asp:TextBox>
            <asp:Button ID="Button5" runat="server" Height="26px" onclick="Button4_Click" 
                Text="To be pressed Third" Width="122px" />

        </ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
        </Triggers>
    </asp:UpdatePanel>

</div>
</form>

- Codebehind：

使用System; 使用System.Collections.Generic; 使用System.Linq; 使用System.Web; 使用System.Web.UI; 使用System.Web.UI.WebControls; 使用System.Net; 使用System.IO; 使用System.Collections;

public partial class _Default：ftp {

protected void Button2_Click(object sender, EventArgs e)
{
    string[] array = (string[])listfiles().ToArray(typeof(string));
    ViewState["FolderName"] = array;
    foreach (string FileName in array)
    {
        ListBox1.Items.Add(FileName);
    }
}
protected void Button3_Click(object sender, EventArgs e)
{
    string[] arraylistbox2 = (string[])ViewState["FolderName"];
    string[] arrays = new string[12];
    ArrayList ListPath = new ArrayList();
    int dateFolder;
    foreach (string  FileName in arraylistbox2)
    {
        dateFolder =  Convert.ToInt16(FileName);
        dateFolder = dateFolder - 1;
        ListPath.Add((string[])(listfiles(FileName).ToArray(typeof(string))));
    }
    ViewState["ArrayList"] = ListPath;
}
protected void Button4_Click(object sender, EventArgs e)
{
    ArrayList FilePath = (ArrayList)ViewState["ArrayList"];
    int i = 0;
    int b = 1;
    foreach(string[] sr in FilePath)
    {
        string Month = sr[i];
        string datewithzero;
        datewithzero = String.Format("{0:00}", b);
        string[] FilesArray = (string[])listfiles(Month, datewithzero).ToArray(typeof(string));

        foreach (string FileNameWithExtension in FilesArray)
        {

            TxtContent.Text = ReturnBodyText(Month, datewithzero, FileNameWithExtension);
            ViewState["Content"] = TxtContent.Text;
            Timer1.Enabled = true;
            Timer1_Tick(ViewState["Content"], e);
        }
        i = i + 1;
        b = b + 1;
    }
}
protected void Timer1_Tick(object sender, EventArgs e)
{

    TxtContent.Text =(string) ViewState["Content"];
    TxtContent.DataBind();


}

Answer 1

可悲的是，你的代码对我没什么帮助。但是，我写了这个，我相信你想做什么 - 部分 - 。在我看来，没有什么比这更好的了。这是代码：

.aspx文件：

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1.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 ID="ScriptManager1" runat="server" />
        <asp:Timer runat="server" ID="Timer1" Interval="1000" Enabled="true" 
            ontick="Timer1_Tick" />
        <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
            <Triggers>
                <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
            </Triggers>
            <ContentTemplate>
                <asp:Label ID="Label1" runat="server" Text=""></asp:Label>
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>
    </form>
</body>
</html>

aspx.cs文件：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Threading;

namespace WebApplication1
{
    public partial class Default : System.Web.UI.Page
    {
        protected static string keeper;
        protected static bool inUse = false;
        protected void Page_Load(object sender, EventArgs e) {}
        protected void Button1_Click(object sender, EventArgs e)
        {
            Thread worker = new Thread(new ThreadStart(workerFunction));
            worker.Start();
            return;
        }
        protected void workerFunction()
        {
            inUse = true;
            for (int i = 0; i < 3; i++)
            {
                TextBox1.Text += "foo";
                keeper = TextBox1.Text;
                Thread.Sleep(1000);
            }
            inUse = false;
            keeper = "";
        }
        protected void Timer1_Tick(object sender, EventArgs e)
        {
            if (inUse)
            {
                TextBox1.Text = Convert.ToString(keeper);
            }
        }
    }
}

通过循环更新文本框文本属性

1 个答案: