1 using System;
2 using System.Data;
3 using System.Drawing;
4 using System.Text;
5 using System.Windows.Forms;
6 namespace Test05
7 {
8 public partial class Form1 : Form
9 {
10 public Form1()
11 {
12 InitializeComponent();
13 }
14 private void Form1_Load(object sender, EventArgs e)
15 {
16 textBox1.PasswordChar = '*';
17 textBox2.UseSystemPasswordChar = true;
18 }
19 }
20 }
![](https://images2015.cnblogs.com/blog/818440/201511/818440-20151111120605103-1507148791.png)
textBox1.PasswordChar = '*',在窗体设置中选择的是“#”,而且不报错,需要我们以代码为主,代码中设置的显示符会最终决定显示效果,而且,优先级
UseSystemPasswordChar > PasswordChar > 控件属性设置