c#.net中,如何获取控件的所有属性,界面上有个TextBox, 一个按钮,一个listview点击按钮将Textbox属性获
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了c#.net中,如何获取控件的所有属性,界面上有个TextBox, 一个按钮,一个listview点击按钮将Textbox属性获相关的知识,希望对你有一定的参考价值。
将textbox的所有属性都显示到listview中。
另外,如果说同一个程序中,还有个从窗体,那个窗体上也有个Textbox,又如何获取另外一个窗体的Textbox所有属性呢?
急!!!回答全面的加分,谢谢!!
for (int i = 0; i < textbox.GetType().GetProperties().Length; i++)
MessageBox.Show(button1.GetType().GetProperties()[i].Name);
2:
form1:
form2 f=new form2(this);
f.ShowDialog();
form2:
form1 f=null;
构造函数:
public form2(form1 fm1)
f=fm1;
窗体load事件(或其他事件) :
for (int i = 0; i < f.textbox.GetType().GetProperties().Length; i++)
MessageBox.Show(button1.GetType().GetProperties()[i].Name);
添加到listview:
循环内:
for (int i = 0; i < textbox.GetType().GetProperties().Length; i++)
ListViewItem it=new ListViewItem();
it.SubItems[0].Text=button1.GetType().GetProperties()[i].Name;
ListView1.Items.Add(it);
参考技术A 1.反射
2.方法很多,最简单的是将一个窗体作为变量给另一个窗体 参考技术B 有个这样的控件
ASP.NET WebForm中JavaScript修改了页面上Label的值,如何在后台代码中获取
在用ASP.NET WebForm开发一个项目时,遇到如下的一个情况
页面上有一个Textbox控件,还有2个Label 控件. 当Textbox控件中的值更改时,两个Label控件上的值做相应的更改, 这一点是通过页面中嵌入的JavaScript来实现的.
但是,Label控件上的值更改后,在后端.cs代码中,通过Label.Text 并不能取到更改后的值。
order.aspx页面代码如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="order.aspx.cs" Inherits="order" %> <!DOCTYPE html> <html> <head runat="server"> <title>Order</title> </head> <body> <form id="orderForm" runat="server"> <div class="form-group"> <label>Product Size</label> <asp:TextBox ID="productSize" runat="server" Text="" CssClass="form-control" type="number" onchange="calculateNumberOfPacks()" ></asp:TextBox> </div> <div class="row"> <div class="col-md-6"> <p>Number of 96 packs: <asp:Label ID="lbl96Pack" runat="server"></asp:Label> </p> </div> <div class="col-md-6"> <p>Number of 24 packs: <asp:Label ID="lbl24Pack" runat="server"></asp:Label> </p> </div> </div> <div class="well"> <asp:Button ID="submit" CssClass="btn btn-primary" runat="server" Text="Place Order" OnClick="submit_Click" /> </div> </form> </body> <script> //also do this on document load //capture the value of the herd size input window.onload = function () { calculateNumberOfPacks(); } function calculateNumberOfPacks(){ var productSize = document.getElementById(\'productSize\').value; var largePacks = 0; var smallPacks; //multiply it by 1.10 productSize = productSize * 1.1; //Round it upwards productSize = Math.ceil(productSize); console.log(productSize); //work out how many packs are required. largePacks = Math.floor((productSize / 96)); console.log("Large Packs: " + largePacks); smallPacks = Math.ceil((productSize - (largePacks * 96)) / 24); console.log("Small Packs: " + smallPacks); //Now inject the value back into the dom document.getElementById(\'lbl96Pack\').innerHTML = largePacks; document.getElementById(\'lbl24Pack\').innerHTML = smallPacks; } </script> </html>
页面如上面,当Textbox中的值由200改为其他值,下面的两个Label的值也会跟着更改
但是,在order.aspx.cs 后台代码中,如下获取:
this.lbl96Pack.Text , this.lbl24Pack.Text 来获取Lable的值,发现获取不到更新后的值.
原因:
你在ASPX页面上用javascript来更新了服务器端控件Label上的值,你需要回发才能使你的服务器端代码来反映这些更改.
解决方法:
创建两个隐藏的客户端控件<input>控件,把更新后的Label的两个值,同时使用JavaScript来更新到这两个隐藏的客户端控件上。在order.aspx.cs后台代码中,直接获取这两个隐藏的客户端控件的value
修改后的order.aspx 代码如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="order.aspx.cs" Inherits="order" %> <!DOCTYPE html> <html> <head runat="server"> <title>Order</title> </head> <body> <form id="orderForm" runat="server"> <div class="form-group"> <label>Product Size</label> <asp:TextBox ID="productSize" runat="server" Text="" CssClass="form-control" type="number" onchange="calculateNumberOfPacks()" ></asp:TextBox> </div> <div class="row"> <div class="col-md-6"> <p>Number of 96 packs: <asp:Label ID="lbl96Pack" runat="server"></asp:Label> <input type="hidden" name="hidden96Pack" id="hidden96Pack" value=""> </p> </div> <div class="col-md-6"> <p>Number of 24 packs: <asp:Label ID="lbl24Pack" runat="server"></asp:Label> <input type="hidden" name="hidden24Pack" id="hidden24Pack" value=""> </p> </div> </div> <div class="well"> <asp:Button ID="submit" CssClass="btn btn-primary" runat="server" Text="Place Order" OnClick="submit_Click" /> </div> </form> </body> <script> //also do this on document load //capture the value of the herd size input window.onload = function () { calculateNumberOfPacks(); } function calculateNumberOfPacks(){ var productSize = document.getElementById(\'productSize\').value; var largePacks = 0; var smallPacks; //multiply it by 1.10 productSize = productSize * 1.1; //Round it upwards productSize = Math.ceil(productSize); console.log(productSize); //work out how many packs are required. largePacks = Math.floor((productSize / 96)); console.log("Large Packs: " + largePacks); smallPacks = Math.ceil((productSize - (largePacks * 96)) / 24); console.log("Small Packs: " + smallPacks); //Now inject the value back into the dom document.getElementById(\'lbl96Pack\').innerHTML = largePacks; document.getElementById(\'lbl24Pack\').innerHTML = smallPacks; document.getElementById(\'hidden96Pack\').value = largePacks; document.getElementById(\'hidden24Pack\').value = smallPacks; } </script> </html>
在order.aspx.cs代码中,如下来获取值
protected void submit_Click(object sender, EventArgs e) { var Pack96 = Request.Form["hidden96Pack"].ToString().Trim(); var Pack24 = Request.Form["hidden24Pack"].ToString().Trim(); }
这样,就完成了
以上是关于c#.net中,如何获取控件的所有属性,界面上有个TextBox, 一个按钮,一个listview点击按钮将Textbox属性获的主要内容,如果未能解决你的问题,请参考以下文章