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private static ConvertValueToDataType ( object value, |
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| value | object | |
| type | ||
| return | object | |
private static object NullValueCoerceValueCallback(DependencyObject sender, object value)
{
ValueRangeTextBox valueRangeTextBox = sender as ValueRangeTextBox;
if (!valueRangeTextBox.IsInitialized)
{
return(DependencyProperty.UnsetValue);
}
if ((value == null) || (value == DBNull.Value))
{
return(value);
}
Type type = valueRangeTextBox.ValueDataType;
if (type == null)
{
throw new InvalidOperationException("An attempt was made to set a null value when the ValueDataType property is null.");
}
if (valueRangeTextBox.IsFinalizingInitialization)
{
value = ValueRangeTextBox.ConvertValueToDataType(value, valueRangeTextBox.ValueDataType);
}
if (value.GetType() != type)
{
throw new ArgumentException("The value is not of type " + type.Name + ".", "NullValue");
}
return(value);
}
private static object MaxValueCoerceValueCallback(DependencyObject sender, object value)
{
ValueRangeTextBox valueRangeTextBox = sender as ValueRangeTextBox;
if (!valueRangeTextBox.IsInitialized)
{
return(DependencyProperty.UnsetValue);
}
if (value == null)
{
return(value);
}
Type type = valueRangeTextBox.ValueDataType;
if (type == null)
{
throw new InvalidOperationException("An attempt was made to set a maximum value when the ValueDataType property is null.");
}
if (valueRangeTextBox.IsFinalizingInitialization)
{
value = ValueRangeTextBox.ConvertValueToDataType(value, valueRangeTextBox.ValueDataType);
}
if (value.GetType() != type)
{
throw new ArgumentException("The value is not of type " + type.Name + ".", "MinValue");
}
IComparable comparable = value as IComparable;
if (comparable == null)
{
throw new InvalidOperationException("MaxValue does not implement the IComparable interface.");
}
object minValue = valueRangeTextBox.MinValue;
// ValidateValueInRange will throw if it must.
valueRangeTextBox.ValidateValueInRange(minValue, value, valueRangeTextBox.Value);
return(value);
}
private void ConvertValuesToDataType(Type type)
{
if (type == null)
{
this.MinValue = null;
this.MaxValue = null;
this.NullValue = null;
this.Value = null;
return;
}
object minValue = this.MinValue;
if ((minValue != null) && (minValue.GetType() != type))
{
this.MinValue = ValueRangeTextBox.ConvertValueToDataType(minValue, type);
}
object maxValue = this.MaxValue;
if ((maxValue != null) && (maxValue.GetType() != type))
{
this.MaxValue = ValueRangeTextBox.ConvertValueToDataType(maxValue, type);
}
object nullValue = this.NullValue;
if (((nullValue != null) && (nullValue != DBNull.Value)) &&
(nullValue.GetType() != type))
{
this.NullValue = ValueRangeTextBox.ConvertValueToDataType(nullValue, type);
}
object value = this.Value;
if (((value != null) && (value != DBNull.Value)) &&
(value.GetType() != type))
{
this.Value = ValueRangeTextBox.ConvertValueToDataType(value, type);
}
}
private static object ValueCoerceValueCallback(object sender, object value)
{
ValueRangeTextBox valueRangeTextBox = sender as ValueRangeTextBox;
if (!valueRangeTextBox.IsInitialized)
{
return(DependencyProperty.UnsetValue);
}
if (valueRangeTextBox.IsFinalizingInitialization)
{
value = ValueRangeTextBox.ConvertValueToDataType(value, valueRangeTextBox.ValueDataType);
}
if (!valueRangeTextBox.IsForcingValue)
{
valueRangeTextBox.ValidateValue(value);
}
return(value);
}