格式化文本框以使用实时输入的值替换设置的占位符值 [英] Format the textbox to replace the set placeholder values with the entered values real time
问题描述
以下是我想用C#存档的内容。
我有一个文本框,我将用它来输入金额。
当前我手动输入全部金额,包括小数,例如10.05
我想要达到的目标是在文本框中设置0.00的默认值,这样如果我按下一个数字,例如55,文本框自动替换默认0.00值的前2个零,显示0.55而不受我的任何人工干扰。
如果我输入3355,它必须自动显示为33.55实时,因为我正在键入
谢谢你花时间研究我的问题。我找到了答案,它在下面。
-----------------------
使用系统;
使用 System.Collections.Generic;
使用 System.ComponentModel;
使用 System.Data;
使用 System.Drawing;
使用 System.Linq;
使用 System.Text;
使用 System.Windows.Forms;
使用 System.Globalization;
使用 System.Text.RegularExpressions;
使用 Microsoft.VisualBasic;
命名空间 frmMain
{
public partial class frmMain:表格
{
public frmMain()
{
InitializeComponent();
}
私有 void textBox1_TextChanged(< span class =code-keyword> object sender,EventArgs e)
{
// 删除以前的格式,否则小数点检查将失败,包括前导零
string value = textBox1.Text.Replace( ,, )
.Replace(
, )。替换( 。, )。TrimStart(' 0');
decimal ul;
// 检查我们确实正在处理一个数字
if ( decimal .TryParse( value , out ul))
{
ul / = 100 ;
// 取消显示事件,以便我们不输入循环
textBox1 .TextChanged - = textBox1_TextChanged;
// 将文本格式化为货币
textBox1.Text = string .Format(CultureInfo.CreateSpecificCulture( en-US), {0:C2},ul);
textBox1.TextChanged + = textBox1_TextChanged;
textBox1.Select(textBox1.Text.Length, 0 );
}
}
private bool TextisValid( string text)
{
Regex money = new 正则表达式( @ ^ \
(\d {1 ,3}(\,\d {3})* |(\d +))(\.\d {2})
Below is what I am trying to archive in C#.
I have a textbox that I will be using to enter an amount.
Current I am entering the full amount manually including the decimal e.g. "10.05"
What I want to achieve is to have a default value on the textbox of "0.00" such that if I press a number e.g. 55, the textbox automatically replaces the first 2 zeros of the default "0.00" value to display "0.55" without any manual interference from me.
If I enter 3355, it has to automatically get displayed as 33.55 real time as I am typing
Hi,
Thank you for taking time to look into my problem. I have found the answer and it is below.
-----------------------
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Globalization; using System.Text.RegularExpressions; using Microsoft.VisualBasic; namespace frmMain { public partial class frmMain : Form { public frmMain() { InitializeComponent(); } private void textBox1_TextChanged(object sender, EventArgs e) { //Remove previous formatting, or the decimal check will fail including leading zeros string value = textBox1.Text.Replace(",", "") .Replace("
", "").Replace(".", "").TrimStart('0'); decimal ul; //Check we are indeed handling a number if (decimal.TryParse(value, out ul)) { ul /= 100; //Unsub the event so we don't enter a loop textBox1.TextChanged -= textBox1_TextChanged; //Format the text as currency textBox1.Text = string.Format(CultureInfo.CreateSpecificCulture("en-US"), "{0:C2}", ul); textBox1.TextChanged += textBox1_TextChanged; textBox1.Select(textBox1.Text.Length, 0); } } private bool TextisValid(string text) { Regex money = new Regex(@"^\
(\d{1,3}(\,\d{3})*|(\d+))(\.\d{2})?
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