添加项目文件。

2026-07-14 13:55:17 +08:00
parent 63759495f2
commit 8bbdf78731
335 changed files with 81415 additions and 0 deletions
@@ -0,0 +1,98 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace JYControl
+{
+    /// <summary>
+    /// TextBox添加水印文字
+    /// </summary>
+    [ToolboxBitmap(typeof(TextBox))]
+    
+    public class WatermarkTextBox : TextBox
+    {
+        private string _watermark;
+        private Color _watermarkColor = Color.DarkGray;
+        private const int WM_PAINT = 0xF;
+
+        public WatermarkTextBox()
+            : base()
+        {
+        }
+        /// <summary>
+        /// 输入需要显示水印文字
+        /// </summary>
+        /// 
+        [Category("控件属性")]
+        [Description("输入需要显示水印文字")]
+        [DefaultValue("")]
+        public string Watermark
+        {
+            get { return _watermark; }
+            set
+            {
+                _watermark = value;
+                base.Invalidate();
+            }
+        }
+
+        /// <summary>
+        /// 改变水印文字的颜色
+        /// </summary>
+        /// 
+        [Category("控件属性")]
+        [Description("改变水印文字的颜色")]
+        [DefaultValue(typeof(Color), "DarkGray")]
+        public Color WatermarkColor
+        {
+            get { return _watermarkColor; }
+            set
+            {
+                _watermarkColor = value;
+                base.Invalidate();
+            }
+        }
+
+        protected override void WndProc(ref Message m)
+        {
+            base.WndProc(ref m);
+            if (m.Msg == WM_PAINT)
+            {
+                WmPaint(ref m);
+            }
+        }
+
+        private void WmPaint(ref Message m)
+        {
+            using (Graphics graphics = Graphics.FromHwnd(base.Handle))
+            {
+                if (Text.Length == 0
+                    && !string.IsNullOrEmpty(_watermark)
+                    && !Focused)
+                {
+                    TextFormatFlags format =
+                        TextFormatFlags.EndEllipsis |
+                        TextFormatFlags.VerticalCenter;
+
+                    if (RightToLeft == RightToLeft.Yes)
+                    {
+                        format |= TextFormatFlags.RightToLeft | TextFormatFlags.Right;
+                    }
+
+                    TextRenderer.DrawText(
+                        graphics,
+                        _watermark,
+                        Font,
+                        base.ClientRectangle,
+                        _watermarkColor,
+                        format);
+                }
+            }
+        }
+    }
+}