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XingCheng3
219
SCADA/Frm_Login.cs
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219
SCADA/Frm_Login.cs
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using System;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.IO;
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using System.Windows.Forms;
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namespace MesWork
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{
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/// <summary>
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/// 登录页面 — 全屏背景图 + 右侧白色登录卡片
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/// </summary>
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public partial class Frm_Login : Form
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{
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/// <summary>
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/// 背景图片缓存
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/// </summary>
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private Image _bgImage;
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public Frm_Login()
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{
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InitializeComponent();
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DoubleBuffered = true;
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LoadBackgroundImage();
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LoadIcon();
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}
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/// <summary>
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/// 加载任务栏图标
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/// </summary>
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private void LoadIcon()
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{
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IconHelper.ApplyIcon(this);
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}
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/// <summary>
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/// 加载背景图片（从 Resources 目录）
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/// </summary>
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private void LoadBackgroundImage()
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{
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try
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{
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string bgPath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Resources", "login_bg.png");
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if (File.Exists(bgPath))
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_bgImage = Image.FromFile(bgPath);
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}
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catch { /* 图片加载失败时使用渐变背景兜底 */ }
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}
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/// <summary>
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/// 绘制背景：优先使用背景图，否则渐变兜底
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/// </summary>
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protected override void OnPaint(PaintEventArgs e)
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{
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base.OnPaint(e);
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var g = e.Graphics;
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g.SmoothingMode = SmoothingMode.AntiAlias;
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g.InterpolationMode = InterpolationMode.HighQualityBicubic;
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if (_bgImage != null)
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{
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// 全屏铺满背景图
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g.DrawImage(_bgImage, 0, 0, ClientSize.Width, ClientSize.Height);
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// 右侧半透明白色蒙层（让登录卡片区域更清晰）
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using (var overlay = new SolidBrush(Color.FromArgb(180, 255, 255, 255)))
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{
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g.FillRectangle(overlay, ClientSize.Width / 2, 0, ClientSize.Width / 2, ClientSize.Height);
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}
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}
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else
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{
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// 渐变兜底
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using (var brush = new LinearGradientBrush(
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ClientRectangle,
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Color.FromArgb(30, 58, 95),
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Color.FromArgb(240, 244, 248),
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LinearGradientMode.Horizontal))
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{
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g.FillRectangle(brush, ClientRectangle);
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}
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}
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// 底部版本信息（放在右下角白色区域，确保清晰可读）
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using (var font = new Font("微软雅黑", 9F))
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using (var brush = new SolidBrush(Color.FromArgb(160, 120, 120, 120)))
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{
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string ver = "v1.0.0 | 潍柴动力 · 称重数据采集分析管理系统";
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var sz = g.MeasureString(ver, font);
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g.DrawString(ver, font, brush, ClientSize.Width - sz.Width - 20, ClientSize.Height - 36);
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}
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}
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/// <summary>
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/// 窗口大小变化时重新定位登录卡片到右半区中央
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/// </summary>
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protected override void OnResize(EventArgs e)
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{
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base.OnResize(e);
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if (pnl_Card != null)
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{
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// 卡片放在右半区的中心位置
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int rightHalfCenter = ClientSize.Width / 2 + ClientSize.Width / 4;
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pnl_Card.Location = new Point(
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rightHalfCenter - pnl_Card.Width / 2,
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(ClientSize.Height - pnl_Card.Height) / 2);
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}
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}
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/// <summary>
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/// 卡片圆角绘制
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/// </summary>
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private void pnl_Card_Paint(object sender, PaintEventArgs e)
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{
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var panel = (Panel)sender;
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int radius = 12;
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var rect = new Rectangle(0, 0, panel.Width - 1, panel.Height - 1);
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using (var path = new GraphicsPath())
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{
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path.AddArc(rect.X, rect.Y, radius * 2, radius * 2, 180, 90);
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path.AddArc(rect.Right - radius * 2, rect.Y, radius * 2, radius * 2, 270, 90);
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path.AddArc(rect.Right - radius * 2, rect.Bottom - radius * 2, radius * 2, radius * 2, 0, 90);
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path.AddArc(rect.X, rect.Bottom - radius * 2, radius * 2, radius * 2, 90, 90);
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path.CloseFigure();
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panel.Region = new Region(path);
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}
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}
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// ====================================================================
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// 登录逻辑
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// ====================================================================
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private void btn_Cancel_Click(object sender, EventArgs e)
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{
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if (MesWorkForm.Curr_UserName == "") Application.Exit();
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else DialogResult = DialogResult.Cancel;
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}
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private void btn_Login_Click(object sender, EventArgs e)
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{
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if (txt_LoginID.Text.Trim() == "")
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{
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lbl_Msg.Text = "⚠ 用户名不能为空";
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lbl_Msg.Visible = true;
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return;
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}
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// 调用新的用户管理表登录验证
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var res = User_Login(txt_LoginID.Text.Trim(), txt_userPassword.Text, out string name, out string perm);
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if (res)
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{
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MesWorkForm.Curr_LoginID = txt_LoginID.Text.Trim();
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MesWorkForm.Curr_UserPassWord = txt_userPassword.Text;
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MesWorkForm.Curr_UserName = name;
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// 记录登录日志
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try { B_DB_Opera.SaveLog_Request(MesWorkForm.Curr_Station, Log_Type.ZK_Login, "", Log_FromAndTo.ZK, Log_FromAndTo.ZK, $"用户[{name}({txt_LoginID.Text.Trim()})]登录系统", out long _); } catch { }
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DialogResult = DialogResult.OK;
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}
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else
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{
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lbl_Msg.Text = "⚠ 登录失败，请检查用户名和密码";
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lbl_Msg.Visible = true;
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}
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}
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/// <summary>
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/// 调用 用户管理_登录验证 SP
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/// </summary>
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private bool User_Login(string userName, string pwd, out string name, out string permission)
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{
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name = "";
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permission = "";
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try
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{
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var sp = "用户管理_登录验证";
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var parms = new System.Data.SqlClient.SqlParameter[]
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{
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new System.Data.SqlClient.SqlParameter("@用户名", userName),
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new System.Data.SqlClient.SqlParameter("@密码", pwd)
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};
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SqlOperation.ExecuteStoredProcedure(sp, parms, out System.Data.DataTable dt, out string err);
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if (dt != null && dt.Rows.Count > 0)
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{
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name = dt.Rows[0]["姓名"].ToString();
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permission = dt.Rows[0]["权限"].ToString();
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return true;
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}
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}
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catch (Exception ex)
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{
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MesWorkForm.WriteLog_Info("Login", $"登录异常：{ex.Message}", ex);
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}
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return false;
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}
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/// <summary>
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/// 回车切换焦点：用户名 → 密码
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/// </summary>
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private void txt_LoginID_KeyDown(object sender, KeyEventArgs e)
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{
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if (e.KeyCode == Keys.Enter) { txt_userPassword.Focus(); e.SuppressKeyPress = true; }
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}
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/// <summary>
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/// 回车触发登录：密码 → 登录
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/// </summary>
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private void txt_userPassword_KeyDown(object sender, KeyEventArgs e)
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{
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if (e.KeyCode == Keys.Enter) { btn_Login_Click(sender, e); e.SuppressKeyPress = true; }
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}
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protected override void OnFormClosed(FormClosedEventArgs e)
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{
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_bgImage?.Dispose();
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base.OnFormClosed(e);
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}
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}
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}
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