用动态控件模拟复合控件(二)

NumberTextBox

public abstract class NumberTextBox<T> : BaseTextBox where T : IComparable<T>
    {
        private T minValue = default(T);
        public virtual T MinValue
        {
            get { return minValue; }
            set { minValue = value; }
        }
        private T maxValue = default(T);
        public virtual T MaxValue
        {
            get { return maxValue; }
            set { maxValue = value; }
        }
        protected abstract T DefaultMinValue { get; }
        protected abstract T DefaultMaxValue { get; }
        protected ValidationDataType type;
        public virtual ValidationDataType Type
        {
            get { return type; }
            set { type = value; }
        }
        public NumberTextBox()
        {
            this.FilterType = FilterTypes.Numbers;
            this.Options = TextBoxOptions.Required | TextBoxOptions.Filtered;
            this.MaxValue = this.DefaultMaxValue;
            this.MinValue = this.DefaultMinValue;
        }
        protected override void BuildValidatorControls()
        {
            base.BuildValidatorControls();
            //添加额外的控件
            if ((this.MinValue.CompareTo(this.DefaultMinValue) != 0) && (this.MaxValue.CompareTo(this.DefaultMaxValue) != 0))
            {
                RangeValidator rv = new RangeValidator();
                rv.ID = "rv_" + this.ID;
                rv.ControlToValidate = this.ID;
                rv.MaximumValue = this.MaxValue.ToString();
                rv.MinimumValue = this.MinValue.ToString();
                rv.SetFocusOnError = true;
                rv.Type = this.Type;
                rv.ErrorMessage = string.Format("{0}的值应该位于{1}和{2}之间", this.DisplayName, this.MinValue, this.MaxValue);
                this.AddValidator(rv);
            }
            else if (this.MinValue.CompareTo(this.DefaultMinValue) != 0)
            {
                CompareValidator cv = new CompareValidator();
                cv.ID = "rv_" + this.ID;
                cv.ControlToValidate = this.ID;
                cv.SetFocusOnError = true;
                cv.Type = this.Type;
                cv.Operator = ValidationCompareOperator.GreaterThanEqual;
                cv.ValueToCompare = this.MinValue.ToString();
                cv.ErrorMessage = string.Format("{0}的值应该大于{1}", this.DisplayName, this.MinValue);
                this.AddValidator(cv);
            }
            else if ((this.MaxValue.CompareTo(this.DefaultMaxValue) != 0))
            {
                CompareValidator cv = new CompareValidator();
                cv.ID = "rv_" + this.ID;
                cv.ControlToValidate = this.ID;
                cv.SetFocusOnError = true;
                cv.Type = this.Type;
                cv.Operator = ValidationCompareOperator.LessThanEqual;
                cv.ValueToCompare = this.MaxValue.ToString();
                cv.ErrorMessage = string.Format("{0}的值应该小于{1}", this.DisplayName, this.MaxValue);
        

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