/// <summary>
/// Convert from a string to the required type of value.
/// This is used when setting field values from strings (eg user input, http request or importing a file).
/// Used in the core by ActiveField and Sqlize
/// It is exposed as a public utility method so it can be used other places too.
/// </summary>
public static object FromString(string stringValue, Type correctType)
{
if (stringValue.IsBlank())
{
// set to default which is null for nullable types or false for bool
return(GetDefaultValue(correctType));
}
stringValue = stringValue.Trim();
// prep value for conversion
TypeConverter conv = TypeDescriptor.GetConverter(correctType);
object thisValue = stringValue;
// do any prep work depending on type
if (correctType.FullName.Contains("System.Boolean")) //this is for bool or nullable bool
{
if (thisValue + "" == "1")
{
thisValue = "True";
}
if (thisValue + "" == "0")
{
thisValue = "False";
}
string lowerVal = (thisValue + "").ToLower();
if (lowerVal == "yes")
{
thisValue = "True";
}
if (lowerVal == "no")
{
thisValue = "False";
}
if (lowerVal == "on")
{
thisValue = "True";
}
if (lowerVal == "off")
{
thisValue = "False";
}
if (lowerVal == "t")
{
thisValue = "True";
}
if (lowerVal == "f")
{
thisValue = "False";
}
}
else if (correctType.FullName.Contains("System.DateTime"))
{
// todo - there must be some prep here for unusual date formats
}
else if (correctType.FullName.Contains("System.Decimal"))
{
thisValue = Fmt.CleanNumber(stringValue);
}
else if (correctType.FullName.Contains("System.Int"))
{
if (stringValue == "on") // "on" allows you to select null in a radio button group with int values (eg IDs)
{
return(GetDefaultValue(correctType));
}
thisValue = "" + Fmt.CleanInt(stringValue);
}
// now convert it
if (conv.CanConvertFrom(typeof(string)))
{
try {
return(conv.ConvertFrom(thisValue));
} catch (Exception e) {
// MN changed from: catch (FormatException e) {
string message = "FromString: '" + stringValue + "' is not a valid value of type " + correctType.Name + "; " + e.Message;
if (!e.Message.Contains("Guid should contain 32 digit"))
{
if (thisValue + "" != "" && !ActiveFieldBase.IgnoreConversionErrors)
{
throw new ActiveRecordException(message, e);
}
}
}
}
else
{
// TODO: Why do we throw an exception here instead of setting "ex"?
throw new FormatException("No type converter available for type: " + correctType.Name);
}
return(GetDefaultValue(correctType));
}