如何更改文本框的值 [英] How to change value of textbox

问题描述

Hi
如何通过更改NumericUpDown的值来更改文本框的值？

当我向NumericUpDown赋值时，我需要文本框取值NumericUpDown

Hi How to change value of textbox by changing the value of NumericUpDown?
I need the textbox to take the value of NumericUpDown when I assing some value to NumericUpDown

推荐答案

使用属性 TextBox.Text ，它是一个读/写属性。



如果你为 NumericUpDown 分配一些值，你不需要做任何其他事情。如果用户更改 NumericUpDown 的值，它将无法工作;在这种情况下，处理事件 NumericUpDown.ValueChanged ;在处理程序的主体中，将 ValueChanged.Value.ToString（）的值赋给 TextBox.Text 。< br $> b $ b

Use the property TextBox.Text, it is a read/write property.

You need not do anything else if you "assign some value" to NumericUpDown. It won't work if the user changes the value of NumericUpDown; in this case, handle the event NumericUpDown.ValueChanged; in the body of the handler, assign the value of ValueChanged.Value.ToString() to TextBox.Text.

NumericUpDown myUpDown = new NumericUpDown();
TextBox myTextBox = new TextBox();

//...

myUpDown.ValueChanged += (sender, eventArgs) => {
    myTextBox.Text = myUpDown.Value.ToString();
}

-SA

您需要做的是将事件处理程序附加到NumericUpDown控件的值更改事件，并使用该事件设置文本的text属性-box：

Hi,

What you need to do is attach an event-handler to the value-changed event of the NumericUpDown control, and use that event to set the text property of the text-box:

numericUpDown1.ValueChanged += delegate
{
    this.textBox1.Text = numericUpDown1.Value.ToString();
};

试试这段代码

try this code

using System;
using System.Windows.Forms;

namespace WindowsFormsApplication12
{
    public partial class Form1 : Form
    {
    public Form1()
    {
        InitializeComponent();
    }

    private void numericUpDown1_ValueChanged(object sender, EventArgs e)
    {
        // You can change other program parts when the value changes.
        this.textBox1.Text = "Value changed to " + numericUpDown1.Value.ToString();
    }
    }
}

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