如何将一个page中的所有TextBox控件遍历然后将其Text属性=string.Empty;呢????

zhuwenli 2009-03-06 04:04:57

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hanyucq123 2009-03-06

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10楼的正解。原来没想到TextBox控件是Form的子控件

zhuwenli 2009-03-06

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可以了！谢谢各位！

zhuwenli 2009-03-06

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可以了！谢谢了！

zhuwenli 2009-03-06

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可以了！谢谢了！

hubblebubblepig 2009-03-06

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遍历看看控件里面是不是有子控件

阿非 2009-03-06

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="SetTextBoxValue.aspx.cs" Inherits="SetTextBoxValue" %>



<!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>无标题页</title>

</head>

<body>

    <form id="form1" runat="server">

    <asp:TextBox ID="TextBox1" runat="server">1</asp:TextBox>

    <asp:TextBox ID="TextBox2" runat="server">2</asp:TextBox>

    <div id="div" runat="server">

    

    <asp:TextBox ID="TextBox3" runat="server">3</asp:TextBox>

    <asp:TextBox ID="TextBox4" runat="server">4</asp:TextBox>

    <asp:TextBox ID="TextBox5" runat="server">5</asp:TextBox>

    <asp:Panel ID="Panel1" runat="server" Height="50px" Width="125px">

        <asp:TextBox ID="TextBox6" runat="server">6</asp:TextBox>

        </asp:Panel>

    </div>

    <asp:Button ID="btnPageShow" runat="server" Text="设置页面下属一级文本框" OnClick="btnPageShow_Click" />

    <asp:Button ID="btnAllShow" runat="server" Text="设置页面全部文本框" OnClick="btnAllShow_Click" />    

        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="还原" />

    </form>

    

</body>

</html>



using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;



public partial class SetTextBoxValue : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {



    }

    protected void btnPageShow_Click(object sender, EventArgs e)

    {

        foreach(Control c in Page.Form.Controls)

        {

            TextBox txt = c as TextBox;

            if (txt!=null)

            {

                txt.Text = string.Empty;

            }

        }

    }

    protected void btnAllShow_Click(object sender, EventArgs e)

    {

        SetTextBox(Page);

    }



    private void SetTextBox(Control c)

    {

        if (c.Controls.Count > 0)

        {

            for (int i = 0; i < c.Controls.Count; i++)

            {

                SetTextBox(c.Controls[i]);

            }

        }



        TextBox txt = c as TextBox;

        if (txt != null)

        {

            txt.Text = string.Empty;

        }        

    }

    protected void Button1_Click(object sender, EventArgs e)

    {

        TextBox1.Text = "1";

        TextBox2.Text = "2";

        TextBox3.Text = "3";

        TextBox4.Text = "4";

        TextBox5.Text = "5";

        TextBox6.Text = "6";

    }

}

limii 2009-03-06

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这样：



private void Page_Load(object sender, EventArgs e)

    {

       

        for(int i = 0; i < this.Controls.Count; i++)

        {

            if (this.Controls[i].GetType().ToString() == "System.Web.UI.HtmlControls.HtmlForm")

            {

                for (int j = 0; j < this.Controls[i].Controls.Count; j++)

                {

                    if (this.Controls[i].Controls[j].ToString() == "System.Web.UI.WebControls.TextBox")

                    {

                        ((TextBox)this.Controls[i].Controls[j]).Text = string.Empty;

                    }

                }

            }

        }

     

    }

neilzaza 2009-03-06

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后台实现



foreach (Control control in form1.Controls)//form1-->form 的 id

        {

            if (control is System.Web.UI.WebControls.TextBox)

            {

                ((System.Web.UI.WebControls.TextBox)control).Text = string.Empty;

            }

        }

bj890 2009-03-06

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neilzaza 2009-03-06

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后台实现：



foreach (Control control in form1.Controls)//form1-->form 的 id

        {

            if (control is System.Web.UI.WebControls.TextBox)

            {

                ((System.Web.UI.WebControls.TextBox)control).Text = string.Empty;

            }

        }

zhuwenli 2009-03-06

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这是我今天的一个面试题要求直接用手写出代码的。

zhuwenli 2009-03-06

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试过了也不行
我是怎么写的不知道对不

foreach (Control con in this.Controls)
{
if (con.GetType().Name == "TextBox")
{
TextBox tb = new TextBox();
tb = (TextBox)this.FindControl(con.ID);
tb.Text = string.Empty;
}

}

chenwei175528 2009-03-06

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不知道用form.FindControl之类的可以找到不？

mark and up and study

hanyucq123 2009-03-06

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帮顶，我也在等到学

zhuwenli 2009-03-06

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顶顶顶顶!

zhuwenli 2009-03-06

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我是这样写的可是不起作用

foreach (Control control in this.Controls)
{
if(control.GetType()==typeof(System.Web.UI.WebControls.TextBox))
{
TextBox textbox = (TextBox)control;
textbox.Text = string.Empty;
}
}