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[英]How do i make a button that inserts A Certain text into a textbox in Visual Studio C#?
[英]How can I make a textBox print a variable in between a certain text?
例如,我需要richTextBox2 來打印richTextBox1 中“AaBb”和“CcDd”之間的任何內容。
if (richTextBox1.Text.Contains ("AaBb x CcDd"))
//print whatever is x in richTextBox2
編輯:我忘了提及我正在嘗試做的事情。 我正在嘗試抓取一個網站並在richTextBox 中打印值(例如歐元到美元)。 到目前為止,這是我的代碼。 不幸的是,它對兩個答案都不起作用。
版本 1:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Net;
using System.Windows.Forms;
namespace BitPrice
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
WebClient priceVariationDollar = new WebClient();
string dollarPrice = priceVariationDollar.DownloadString("https://www.xe.com/pt/currencyconverter/convert/?Amount=1&From=EUR&To=USD");
euroTextBox.Text = dollarPrice;
if (euroTextBox.Text.Contains("<span class=converterresult - toAmount></span>"));
{
int p1, p2;
p1 = euroTextBox.Text.IndexOf("<Span class=converterresoult - toAmount>");
p2 = euroTextBox.Text.IndexOf("</span>");
if (p2 > p1 + 4)
{
dollarTextBox.Text = euroTextBox.Text.Substring(p1 + 4, p2 - p1 - 4);
}
}
}
}
版本 2:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Net;
using System.Windows.Forms;
namespace BitPrice
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
WebClient priceVariationDollar = new WebClient();
string dollarPrice = priceVariationDollar.DownloadString("https://www.xe.com/pt/currencyconverter/convert/?Amount=1&From=EUR&To=USD");
euroTextBox.Text = dollarPrice;
if (euroTextBox.Text.Contains("<span class=converterresult - toAmount></span>"));
{
var startIndex = euroTextBox.Text.IndexOf("<span class=converterresult - toAmount>") + "<span class=converterresult - toAmount>".Length;
var endIndex = euroTextBox.Text.IndexOf("</span>");
if (startIndex >= 0 && endIndex > startIndex)
dollarTextBox.Text = euroTextBox.Text.Substring(startIndex, endIndex - startIndex);
}
}
}
抱歉,如果太長
您需要首先檢查這兩個文本是否在richTextBox1
中,然后如果它們都退出,則查看第一個是否在第二個之前,然后您取兩者之間的內容。
int p1, p2;
string t1, t2;
t1 = "....."; //Your first searched text
t2 = "..."; //Your second searched text
p1 = richTextBox1.Text.IndexOf(t1);
p2 = richTextBox1.Text.IndexOf(t2);
if (p2 > p1 + t1.Length)
richTextBox2.Text1 = richTextBox1.Text.Substring(p1 + t1.Length, p2 - p1 - t1.Length);
var startIndex = richTextBox1.Text.IndexOf("AaBb") + "AaBb".Length;
var endIndex = richTextBox1.Text.IndexOf("CcDd");
if (startIndex >= 0 && endIndex > startIndex)
richTextBox2.Text = richTextBox1.Text.Substring(startIndex, endIndex - startIndex);
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