TryParse()
OutputVar := MfSByte.TryParse(result, s)
OutputVar := MfSByte.TryParse(result, s, style[, provider ])
Tries to converts the s representation of a number to its MfSByte equivalent. A return value indicates whether the conversion succeeded.
result
Contains the value equivalent to the number contained in obj, if the conversion succeeded.
The conversion fails if the obj parameter is not of the correct format, or represents a number less than MinValue or greater than MaxValue.
s
An object convert.
Can be var or instance of MfChar, MfString
Returns true if parse is a success; Otherwise false
Throws MfInvalidOperationException if not called as static method.
The conversion fails and the method returns false if the s parameter is not in the correct format, if it is null, or if it represents a number less than MinValue or greater than MaxValue.
The MfSByte.TryParse(MfSByte, String) method is similar to the MfSByte.Parse(String) method, except that MfSByte.TryParse(MfSByte, String) does not throw an exception if the conversion fails.
The s parameter contains a number of the form:
[ws][sign]digits[ws]
Elements in square brackets ([ and ]) are optional. The following table describes each element.
Element |
Description |
ws |
Optional white space. |
sign |
An optional positive or negative sign. |
digits |
A sequence of digits ranging from 0 to 9 |
The s parameter is interpreted using the MfNumberStyles.Integer style. In addition to the byte value's decimal digits, only leading and trailing spaces together with a leading sign are allowed. (If the sign is present, it must be a positive sign or the method throws an MfOverFlowExcpetion.)
sb := new MfText.StringBuilder()
byteString := "1024"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "100.1"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "100"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "+100"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "000000000000000100"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "00,100"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := " 20 "
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "FB"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "0xFF"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
MsgBox % sb.ToString()
/*
Attempted conversion of '1024' failed.
Attempted conversion of '100.1' failed.
Attempted conversion of '100' failed.
Attempted conversion of '+100' failed.
Attempted conversion of '000000000000000100' failed.
Attempted conversion of '00,100' failed.
Attempted conversion of ' 20 ' failed.
Attempted conversion of 'FB' failed.
Attempted conversion of '0xFF' failed.
*/
Tries to converts the s representation of a number to its MfSByte equivalent. A return value indicates whether the conversion succeeded.
result
Contains the value equivalent to the number contained in obj, if the conversion succeeded.
The conversion fails if the obj parameter is not of the correct format, or represents a number less than MinValue or greater than MaxValue.
s
An string var of object convert.
Can be var or instance of MfChar, MfString
style
MfNumberStyles Instance or Integer var representing instance.
A bitwise combination of MfNumberStyles values that indicates the style elements that can be present in s. A typical value to specify is MfNumberStyles.Integer.
provider
An Optional object that supplies culture-specific parsing information about s. If provider is null, then MfNumberFormatInfo is used.
Returns true if parse is a success; Otherwise false
Throws MfInvalidOperationException if not called as static method.
Throws MfArgumentException style is not a MfNumberStyles value.
-or-
style is not a combination of MfNumberStyles.AllowHexSpecifier and MfNumberStyles.HexNumber values.
The TryParse method is like the Parse method, except the TryParse method does not throw an exception if the conversion fails. It eliminates the need to use exception handling to test for a MfFormatException in the event that s is invalid and cannot be parsed successfully.
The style parameter defines the style elements (such as white space or a positive or negative sign) that are allowed in the s parameter for the parse operation to succeed. It must be a combination of bit flags from the NumberStyles enumeration.
The s parameter contains a number of the form:
[ws][sign]digits[ws]
Elements in square brackets ([ and ]) are optional. The following table describes each element.
Element |
Description |
ws |
Optional white space. |
sign |
An optional positive or negative sign. |
digits |
A sequence of digits ranging from 0 to 9 |
The s parameter is interpreted using the MfNumberStyles.Integer style. In addition to the byte value's decimal digits, only leading and trailing spaces together with a leading sign are allowed. (If the sign is present, it must be a positive sign or the method throws an MfOverFlowExcpetion.)
Example
sb := new MfText.StringBuilder()
byteString := "1024"
styles := MfNumberStyles.Instance.Integer
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString, styles))
sb.AppendFormat("Converted '{0}' to {1:i}", byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "100.1"
styles := MfNumberStyles.Instance.Integer.Value | MfNumberStyles.Instance.AllowDecimalPoint.Value
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString, styles))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "100.0"
styles := MfNumberStyles.Instance.Integer.Value | MfNumberStyles.Instance.AllowDecimalPoint.Value
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString, styles))
sb.AppendFormat("Converted '{0}' to {1:i}", byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "+100"
styles := new MfNumberStyles()
styles.AddFlag(MfNumberStyles.Instance.Integer)
styles.AddFlag(MfNumberStyles.Instance.AllowLeadingSign)
styles.AddFlag(MfNumberStyles.Instance.AllowTrailingSign)
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString, styles))
sb.AppendFormat("Converted '{0}' to {1:i}", byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "-100"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}", byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "000000000000000100"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}", byteString, pByte.Value)
else
sb.AppendFormatted("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "00,100"
styles := new MfNumberStyles(MfNumberStyles.Instance.Integer, MfNumberStyles.Instance.AllowThousands)
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString, styles))
sb.AppendFormat("Converted '{0}' to {1:i}", byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "2E+3 "
styles := new MfNumberStyles(MfNumberStyles.Instance.Integer, MfNumberStyles.Instance.AllowExponent)
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}", byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "FB"
styles := MfNumberStyles.Instance.HexNumber
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString, styles))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
sb.AppendLine()
byteString := "0xFF"
pByte := new MfSByte()
if (MfSByte.TryParse(pByte, byteString))
sb.AppendFormat("Converted '{0}' to {1:i}",byteString, pByte.Value)
else
sb.AppendFormat("Attempted conversion of '{0}' failed.",byteString)
MsgBox % sb.ToString()
/*
Attempted conversion of '1024' failed.
Attempted conversion of '100.1' failed.
Attempted conversion of '100.0' failed.
Attempted conversion of '+100' failed.
Attempted conversion of '-100' failed.
Attempted conversion of '000000000000000100' failed.
Attempted conversion of '00,100' failed.
Attempted conversion of '2E+3 ' failed.
Converted 'FB' to -5
Attempted conversion of '0xFF' failed.
*/