C#修改密码的代码 public FrmXiuGaiMiMa() { InitializeComponent(); } private bool JudgeNewPwd() { string newPwd1 = this.txtNewPwd1.Text; string newPwd2 = this.txtNewPwd2.Text; if (newPwd1.Equals(newPwd2)) return true; else MessageBox.Show("两次输入的新密码不相等,请重新输入！","系统提示"); return false; } private bool Confirmation() { if (this.txtName.Text != string.Empty && this.txtOldPwd.Text != string.Empty&&this .txtNewPwd1 .Text !=string .Empty &&this .txtNewPwd2 .Text !=string .Empty ) return true; else MessageBox.Show("用户名和密码不能为空！", "系统提示"); return false; } private void Form4_Load(object sender, EventArgs e) { } private void button2_Click(object sender, EventArgs e) { this.Close(); } private void button1_Click(object sender, EventArgs e) { if (Confirmation()) { if (JudgeNewPwd()) { string oldPwd = this.txtOldPwd.Text; string uname = this.txtName.Text; string newPwd1 = this.txtNewPwd1.Text.ToString (); string sql = string.Format("update _UserInfo set UPassWord='{0}' where UPassWord='{1} 'and UName='{2}'",newPwd1 ,oldPwd ,uname ); if (DataAccess.UpdataDataTable(sql)) MessageBox.Show("修改成功！", "系统提示"); else MessageBox.Show("修改失败！","系统提示"); } } } 本文来源：https://www.wddqw.com/doc/c4692fedf8c75fbfc77db27c.html