C#-TextBox-登录表单password无形---ShinePans

      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;

namespace TextBox_1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            textBox1.PasswordChar = '@'; //设置文本框的PasswordChar属性为字符@
            textBox2.UseSystemPasswordChar = true;
            //设置文本框的UseSystemPasswordChar属性为True;
        }

        private void label1_Click(object sender, EventArgs e)
        {

        }
    }
}
    

program.cs:

      using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace TextBox_1
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            //Enabled 获取或设置一个值,该值指示控件能否够对用户交互做出响应
            //ForeColor:获取或设置控件的前景色
            //Modifiers:指示TextBox控件的可见性级别
            //Multiline://获取或设置字符,该字符用于
            //PasswordChar:获取或设置字符
            //                          :public char PasswordChar{get; set;}
            //ReadOnly:获取或设置一个值,该值指示文本框中的文本是否为仅仅读
            //               :public bool ReadOnly{get ; set; }
            //               :TextBox.ReadOnly=true;  将文本设置为仅仅读
            //RightToLeft:获取或设置一个值.该值指示是否将控件的元素对齐以支持使用从右向左的字体区域设置
            //ScrollBars:获取或设置哪些滚动栏应出如今多行TextBox控件中
            //Text:获取或设置TextBox控件的文本
            //UseSystemPasswordChar:获取或设置一个值,该值指示TextBox控件中的文本是否应该以默认的password字符显示
            //                                              :public Bool UseSystemPasswordChar{get ;set ;}
            //Visible:获取或设置一个值,该值指示是否显示该控件及其全部父控件
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());

        }
    }
}

    

Form设计:

      namespace TextBox_1
{
    partial class Form1
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理全部正在使用的资源。
        /// </summary>
        /// <param name="disposing">假设应释放托管资源，为 true。否则为 false。
      

      
      

        </param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗口设计器生成的代码

        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器改动此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.SuspendLayout();
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(155, 27);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(121, 21);
            this.textBox1.TabIndex = 0;
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(155, 77);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(121, 21);
            this.textBox2.TabIndex = 1;
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(66, 30);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(83, 12);
            this.label1.TabIndex = 2;
            this.label1.Text = "PassWordChar:";
            this.label1.Click += new System.EventHandler(this.label1_Click);
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(12, 80);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(137, 12);
            this.label2.TabIndex = 3;
            this.label2.Text = "UseSystemPassWordChar:";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(318, 151);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.textBox1);
            this.Name = "Form1";
            this.Text = "登录";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
    }
}