这是我的代码。当我打开文本文件时，它会改变文本的字体大小，然后着色所有文本，使其高亮，就像我选择所有文本一样。
string s = richTextBox1.Text;
richTextBox1.Clear();
richTextBox1.Text = s;
我试着添加这个：
this.richTextBox.SelectionStart = 0;
this.richTextBox.SelectionLength = richTextBox.Text.Length;
this.richTextBox.SelectionBackColor = Color.White;
它做了诀窍，但问题是文本现在回到原来的小尺寸。 我之前也试过添加它：
{{1}}
但是这没有做到。
答案 0 :(得分：2)
您正在直接更改Text属性：<?php
require_once("./includes/database_connection.php");
error_reporting(E_ALL);
ini_set('display_errors', 1);
$query = "SELECT customerNumber, customerName, contactLastName, contactFirstName, phone, addressLine1, addressLine2, city, state, postalCode, country, salesRepEmployeeNumber, creditLimit FROM customers ORDER BY customerNumber ASC";
$result = mysqli_query($dbc, $query)
or die ('Error querying database');
?>
<!DOCTYPE html>
<html>
<head>
<meta charset='utf-8'>
<title>Home</title>
<link type="text/css" rel="stylesheet" href="classic_cars.css" />
<style>
#table2{
width: 100px;
height: 50px;
padding: 50px;
}
</style>
</head>
<div>
<body>
<?php
require_once("./includes/navigation.php");
?>
<div id="table2">
<table border= "1">
<tr>
<td>customerNumber</td>
<td>customerName</td>
<td>contactLastName</td>
<td>contactFirstName</td>
<td>phone</td>
<td>addressLine1</td>
<td>addressLine2</td>
<td>city</td>
<td>state</td>
<td>postalCode</td>
<td>country</td>
<td>salesRepEmployeeNumber</td>
<td>creditLimit</td>
</tr>
<?php
while($row = mysqli_fetch_array($result)) {
$customer_number = $row['customerNumber'];
$customer_name = $row['customerName'];
$contact_last_name = $row['contactLastName'];
$contact_first_name = $row['contactFirstName'];
$phone_number = $row['phone'];
$address_1 = $row['addressLine1'];
$address_2 = $row['addressLine2'];
$city = $row['city'];
$state = $row['state'];
$postal_code = $row['postalCode'];
$country = $row['country'];
$salesrep_number = $row['salesRepEmployeeNumber'];
$credit_limit = $row['creditLimit'];
echo "<tr>
<td>$customer_number</td>
<td>$customer_name</td>
<td>$contact_last_name</td>
<td>$contact_first_name</td>
<td>$phone_number</td>
<td>$address_1</td>
<td>$address_2</td>
<td>$city </td>
<td>$state</td>
<td>$postal_code</td>
<td>$country</td>
<td>$salesrep_number</td>
<td>$credit_limit</td>
</tr>";
} // end while loop
?>
</table>
</div>
<?php
require_once("./includes/footer.php");
?>
</body>
</html>
如果您不想弄乱任何格式，请不要这样做或richTextBox1.Text = s;。有关规则，请参阅here。
更改此
richTextBox1.Text = File.ReadAllText(filename);到此：
if (theDialog.ShowDialog() == DialogResult.OK)
{
string filename = theDialog.FileName;
richTextBox1.Text = File.ReadAllText(filename);
this.richTextBox1.SelectionStart = 0;
this.richTextBox1.SelectionLength = this.richTextBox1.Text.Length;
this.richTextBox1.SelectionFont = new System.Drawing.Font("Maiandra GD", 30);
string s = richTextBox1.Text;
richTextBox1.Clear();
richTextBox1.Text = s;
}
我不知道＆＃39;突出显示＆＃39;你提到但是当你在选择之外插入文本时，它可能会将文本恢复为默认字体＆amp;您之前设置的属性..