自己动手做组件.

因为新的项目是一个Winform的项目,其中有大量的数据输入部分,如果要加验证的话比较麻烦,所以自己就动手做了一个输入控件.比较简单.希望对初学者有所帮助.提供代码以供参考.

  1using System.ComponentModel;
  2using System.Text.RegularExpressions;
  3using System.Windows.Forms;
  4
  5namespace com.xxxx.Controls
  6{
  7    /**//// <summary>
  8    /// 输入框的处理
  9    /// </summary>
 10    public class InputEditBox : TextBox
 11    {
 12        public enum InputType
 13        {
 14            String, //字符型,
 15            Float, //浮点型,
 16            Integer, //整型
 17            Custom //自定义类型
 18        }
 19
 20        public InputType inputType;
 21
 22        public InputEditBox() : base()
 23        {
 24        }
 25
 26        protected override void OnPaint(PaintEventArgs pe)
 27        {
 28            // 调用基类 OnPaint
 29            base.OnPaint(pe);
 30        }
 31
 32        重写方法#region 重写方法
 33
 34        private ErrorProvider errorProvider1 = new ErrorProvider();
 35        private string customType = string.Empty;
 36        private bool isMust = false;
 37
 38        
 39        /**//// <summary>
 40        /// 对输入的数据合法检查 在成功验证控件后发生
 41        /// </summary>
 42        /// <param name="e"></param>
 43        protected override void OnValidating(CancelEventArgs e)
 44        {
 45            base.OnValidating(e);
 46            if (CausesValidation)
 47            {
 48                if (isMust)
 49                {
 50                    if (Text.Trim() == string.Empty)
 51                    {
 52                        errorProvider1.SetError(this, "必须输入");
 53                        e.Cancel = true;
 54                        return;
 55                    }
 56                }
 57                switch (inputType)
 58                {
 59                    case InputType.Integer:
 60                        if (Text.Trim() != string.Empty)
 61                        {
 62                            if (!Regex.IsMatch(Text.Trim(), @"^([1-9]\d*)$|^0$"))
 63                            {
 64                                errorProvider1.SetError(this, "请输入整型.");
 65                                e.Cancel = true;
 66                                return;
 67                            }
 68                        }
 69                        break;
 70                    case InputType.Float:
 71                        if (Text.Trim() != string.Empty)
 72                        {
 73                            if (!Regex.IsMatch(Text.Trim(), @"^([+-]?)\\d*\\.?\\d+$"))
 74                            {
 75                                errorProvider1.SetError(this, "请输入浮点类型.");
 76                                e.Cancel = true;
 77                                return;
 78                            }
 79                        }
 80                        break;
 81                    case InputType.String:
 82                        if (Text.Trim() == string.Empty)
 83                        {
 84                            errorProvider1.SetError(this, "请输入字符串,不能为空.");
 85                            e.Cancel = true;
 86                            return;
 87                        }
 88                        break;
 89                    case InputType.Custom:
 90                        if (Text.Trim() != string.Empty)
 91                        {
 92                            if (!Regex.IsMatch(Text.Trim(), CustomType))
 93                            {
 94                                errorProvider1.SetError(this, "请输入指定类型的数值.");
 95                                e.Cancel = true;
 96                                return;
 97                            }
 98                        }
 99                        break;
100                }
101                errorProvider1.SetError(this, "");
102            }
103        }
104
105        #endregion  
106
107        属性#region 属性
108
109        [CategoryAttribute("Data"), DescriptionAttribute("选择类型")]
110        public InputType DataType
111        {
112            get { return inputType; }
113            set { inputType = value; }
114        }
115
116        [CategoryAttribute("Data"), DescriptionAttribute("自定义验证方式使用的表达式")]
117        public string CustomType
118        {
119            get { return customType; }
120            set { customType = value; }
121        }
122
123        [CategoryAttribute("Data"), DescriptionAttribute("是否必须输入")]
124        public bool IsMust
125        {
126            get { return isMust; }
127            set { isMust = value; }
128        }
129
130        #endregion
131    }
132}

在使用过程中,可能会出现,在点击关闭窗体的"X"时,无法关闭的问题.出现这个问题是由于触发了基类中的Validating事件,所以提供一个笨方法给他家,在窗体的Closing事件中简单设置一下:
e.Cancel = false;
就可以了.

如果大家有什么好的解决方法,也可以提出来,大家一下学习.