用動態控件模擬復合控件(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();
            //添加額外的控件
            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}的值應該位於{1}和{2}之間", 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}的值應該大於{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}的值應該小於{1}", this.DisplayName, this.MaxValue);
                this.AddValidator(cv);
            }
        }
    }
    public class NumberTextBox : NumberTextBox<int>
    {
        public NumberTextBox()
        {
            this.Type = ValidationDataType.Integer;
        }
        protected override int DefaultMinValue
        {
            get { return int.MinValue; }
        }
        protected override int DefaultMaxValue
        {
            get { return int.MaxValue; }
        }
    }
    public class MoneyTextBox : NumberTextBox<decimal>
    {
        public MoneyTextBox()
        {
            this.Type = ValidationDataType.Currency;
        }
       protected override decimal DefaultMinValue
        {
            get { return decimal.MinValue; }
        }
        protected override decimal DefaultMaxValue
        {
            get { return decimal.MaxValue; }
        }
    }