Microsoft x format

Any image, link, or discussion of nudity. Any behavior that is insulting, rude, vulgar, desecrating, or showing disrespect. Any behavior that appears to violate End user license agreements, including providing product keys or links to pirated software.

Unsolicited bulk mail or bulk advertising. Any link to or advocacy of virus, spyware, malware, or phishing sites. Any other inappropriate content or behavior as defined by the Terms of Use or Code of Conduct. Any image, link, or discussion related to child pornography, child nudity, or other child abuse or exploitation. Details required : characters remaining Cancel Submit 12 people found this reply helpful. Max Impact. This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread.

I have the same question Report abuse. Details required :. Cancel Submit. Previous Next. How have you got to this point?

The Format method retrieves the argument and derives its string representation as follows:. If the argument is null , the method inserts String. Empty into the result string. You don't have to be concerned with handling a NullReferenceException for null arguments. If the format item includes a formatString argument, it is passed as the first argument to the method.

If the ICustomFormatter implementation is available and produces a non-null string, that string is returned as the string representation of the argument; otherwise, the next step executes. If the argument implements the IFormattable interface, its IFormattable. ToString implementation is called. The argument's parameterless ToString method, which either overrides or inherits from a base class implementation, is called.

For an example that intercepts calls to the ICustomFormatter. Format method and allows you to see what information the Format method passes to a formatting method for each format item in a composite format string, see Example: An intercept provider and Roman numeral formatter. For more information, see the Processing Order section in the Composite Formatting article. The Format method throws a FormatException exception if the index of an index item is greater than or equal to the number of arguments in the argument list.

However, format can include more format items than there are arguments, as long as multiple format items have the same index. In the call to the Format String, Object method in following example, the argument list has a single argument, but the format string includes two format items: one displays the decimal value of a number, and the other displays its hexadecimal value. Generally, objects in the argument list are converted to their string representations by using the conventions of the current culture, which is returned by the CultureInfo.

CurrentCulture property. You can control this behavior by calling one of the overloads of Format that includes a provider parameter. The provider parameter is an IFormatProvider implementation that supplies custom and culture-specific formatting information that is used to moderate the formatting process.

The IFormatProvider interface has a single member, GetFormat , which is responsible for returning the object that provides formatting information. Its GetFormat method returns a culture-specific NumberFormatInfo object for formatting numeric values and a culture-specific DateTimeFormatInfo object for formatting date and time values. DateTimeFormatInfo , which is used for culture-specific formatting of date and time values.

Its GetFormat method returns itself. NumberFormatInfo , which is used for culture-specific formatting of numeric values. Its GetFormat property returns itself. You can also call the any of the overloads of the Format method that have a provider parameter of type IFormatProvider to perform custom formatting operations. For example, you could format an integer as an identification number or as a telephone number.

To perform custom formatting, your provider argument must implement both the IFormatProvider and ICustomFormatter interfaces. GetFormat implementation and requests an object of type ICustomFormatter. It then calls the returned ICustomFormatter object's Format method to format each format item in the composite string passed to it. For an example that converts integers to formatted custom numbers, see Example: A custom formatting operation.

For an example that converts unsigned bytes to Roman numerals, see Example: An intercept provider and Roman numeral formatter. This example defines a format provider that formats an integer value as a customer account number in the form x-xxxxx-xx. This example defines a custom format provider that implements the ICustomFormatter and IFormatProvider interfaces to do two things:. It displays the parameters passed to its ICustomFormatter. Format implementation.

This enables us to see what parameters the Format IFormatProvider, String, Object[] method is passing to the custom formatting implementation for each object that it tries to format. This can be useful when you're debugging your application. If the object to be formatted is an unsigned byte value that is to be formatted by using the "R" standard format string, the custom formatter formats the numeric value as a Roman numeral.

More flexible. It can be used in any string without requiring a call to a method that supports composite formatting. Otherwise, you have to call the Format method or another method that supports composite formatting, such as Console. WriteLine or StringBuilder. More readable. Because the expression to insert into a string appears in the interpolated expression rather than in a argument list, interpolated strings are far easier to code and to read.

Because of their greater readability, interpolated strings can replace not only calls to composite format methods, but they can also be used in string concatenation operations to produce more concise, clearer code. A comparison of the following two code examples illustrates the superiority of interpolated strings over string concatenation and calls to composite formatting methods.

The use of multiple string concatenation operations in the following example produces verbose and hard-to-read code. In contrast, the use of interpolated strings in the following example produce much clearer, more concise code than the string concatenation statement and the call to the Format method in the previous example.

For enumeration values, see Enumeration Format Strings. For Guid values, see the Remarks section of the Guid. ToString String reference page. If this value is negative, text in the field is left-aligned. If it is positive, text is right-aligned. All standard numeric format strings except "D" which is used with integers only , "G", "R", and "X" allow a precision specifier that defines the number of decimal digits in the result string.

The following example uses standard numeric format strings to control the number of decimal digits in the result string. If you're using a custom numeric format string , use the "0" format specifier to control the number of decimal digits in the result string, as the following example shows. By default, formatting operations only display non-zero integral digits.

If you are formatting integers, you can use a precision specifier with the "D" and "X" standard format strings to control the number of digits. You can pad an integer or floating-point number with leading zeros to produce a result string with a specified number of integral digits by using the "0" custom numeric format specifier , as the following example shows. There is no practical limit.

The second parameter of the Format IFormatProvider, String, Object[] method is tagged with the ParamArrayAttribute attribute, which allows you to include either a delimited list or an object array as your format list. For example, how do you prevent the following method call from throwing a FormatException exception?

A single opening or closing brace is always interpreted as the beginning or end of a format item. To be interpreted literally, it must be escaped. However, even escaped braces are easily misinterpreted. We recommend that you include braces in the format list and use format items to insert them in the result string, as the following example shows.

The most common cause of the exception is that the index of a format item doesn't correspond to an object in the format list. Usually this indicates that you've misnumbered the indexes of format items or you've forgotten to include an object in the format list. Attempting to include an unescaped left or right brace character also throws a FormatException.

For example, the following code throws a FormatException exception:. This is a problem of compiler overload resolution. Because the compiler cannot convert an array of integers to an object array, it treats the integer array as a single argument, so it calls the Format String, Object method. The exception is thrown because there are four format items but only a single item in the format list. A "G" format specifier that represents a customary or common format of the object.

The parameterless overload of your object's ToString method should call its ToString String overload and pass it the "G" standard format string. Support for a format specifier that is equal to a null reference Nothing in Visual Basic. A format specifier that is equal to a null reference should be considered equivalent to the "G" format specifier.

For example, a Temperature class can internally store the temperature in degrees Celsius and use format specifiers to represent the value of the Temperature object in degrees Celsius, degrees Fahrenheit, and kelvins. The following example provides an illustration.

In addition to the standard format strings,. NET defines custom format strings for both numeric values and date and time values. A custom format string consists of one or more custom format specifiers that define the string representation of a value. Similarly, the custom format string "" converts the integer value 12 to "". The following example uses the "M" custom format specifier to display a one-digit or two-digit number of the month of a particular date.

Many standard format strings for date and time values are aliases for custom format strings that are defined by properties of the DateTimeFormatInfo object. Custom format strings also offer considerable flexibility in providing application-defined formatting for numeric values or date and time values. You can define your own custom result strings for both numeric values and date and time values by combining multiple custom format specifiers into a single custom format string.

The following example defines a custom format string that displays the day of the week in parentheses after the month name, day, and year. The following example defines a custom format string that displays an Int64 value as a standard, seven-digit U.

Although standard format strings can generally handle most of the formatting needs for your application-defined types, you may also define custom format specifiers to format your types. For information on the specific format strings supported by each type, see the following topics:. Although format specifiers let you customize the formatting of objects, producing a meaningful string representation of objects often requires additional formatting information.

NET, this additional formatting information is made available through the IFormatProvider interface, which is provided as a parameter to one or more overloads of the ToString method of numeric types and date and time types. IFormatProvider implementations are used in. NET to support culture-specific formatting. The following example illustrates how the string representation of an object changes when it is formatted with three IFormatProvider objects that represent different cultures.

The IFormatProvider interface includes one method, GetFormat Type , which has a single parameter that specifies the type of object that provides formatting information. If the method can provide an object of that type, it returns it. Otherwise, it returns a null reference Nothing in Visual Basic. GetFormat is a callback method. The GetFormat method is responsible for returning an object that provides the necessary formatting information, as specified by its formatType parameter, to the ToString method.

A number of formatting or string conversion methods include a parameter of type IFormatProvider , but in many cases the value of the parameter is ignored when the method is called.

The following table lists some of the formatting methods that use the parameter and the type of the Type object that they pass to the IFormatProvider. GetFormat method. The ToString methods of the numeric types and date and time types are overloaded, and only some of the overloads include an IFormatProvider parameter.

If a method does not have a parameter of type IFormatProvider , the object that is returned by the CultureInfo. CurrentCulture property is passed instead. For example, a call to the default Int ToString method ultimately results in a method call such as the following: Int ToString "G", System.

DateTimeFormatInfo , a class that provides formatting information for date and time values for a specific culture. Its IFormatProvider. GetFormat implementation returns an instance of itself.

NumberFormatInfo , a class that provides numeric formatting information for a specific culture. GetFormat implementation can return either a NumberFormatInfo object to provide numeric formatting information or a DateTimeFormatInfo object to provide formatting information for date and time values.

You can also implement your own format provider to replace any one of these classes. However, your implementation's GetFormat method must return an object of the type listed in the previous table if it has to provide formatting information to the ToString method.

By default, the formatting of numeric values is culture-sensitive. If you do not specify a culture when you call a formatting method, the formatting conventions of the current culture are used.

This is illustrated in the following example, which changes the current culture four times and then calls the Decimal. ToString String method. In each case, the result string reflects the formatting conventions of the current culture. You can also format a numeric value for a specific culture by calling a ToString overload that has a provider parameter and passing it either of the following:.

A CultureInfo object that represents the culture whose formatting conventions are to be used. Its CultureInfo. GetFormat method returns the value of the CultureInfo. NumberFormat property, which is the NumberFormatInfo object that provides culture-specific formatting information for numeric values. A NumberFormatInfo object that defines the culture-specific formatting conventions to be used.

Its GetFormat method returns an instance of itself. The following example uses NumberFormatInfo objects that represent the English United States and English Great Britain cultures and the French and Russian neutral cultures to format a floating-point number. By default, the formatting of date and time values is culture-sensitive. This is illustrated in the following example, which changes the current culture four times and then calls the DateTime. This is because the DateTime.

ToString , DateTime. ToString , and DateTimeOffset. ToString String methods wrap calls to the DateTime. You can also format a date and time value for a specific culture by calling a DateTime. ToString or DateTimeOffset. ToString overload that has a provider parameter and passing it either of the following:. DateTimeFormat property, which is the DateTimeFormatInfo object that provides culture-specific formatting information for date and time values.

A DateTimeFormatInfo object that defines the culture-specific formatting conventions to be used. Typically, types that overload the ToString method with a format string and an IFormatProvider parameter also implement the IFormattable interface. This interface has a single member, IFormattable.

ToString String, IFormatProvider , that includes both a format string and a format provider as parameters. Implementing the IFormattable interface for your application-defined class offers two advantages:. Support for string conversion by the Convert class. Calls to the Convert. ToString Object and Convert.

Support for composite formatting. If a format item that includes a format string is used to format your custom type, the common language runtime automatically calls your IFormattable implementation and passes it the format string.

For more information about composite formatting with methods such as String. Format or Console. WriteLine , see the Composite Formatting section. The following example defines a Temperature class that implements the IFormattable interface. It supports the "C" or "G" format specifiers to display the temperature in Celsius, the "F" format specifier to display the temperature in Fahrenheit, and the "K" format specifier to display the temperature in Kelvin.

The following example instantiates a Temperature object. It then calls the ToString method and uses several composite format strings to obtain different string representations of a Temperature object. Each of these method calls, in turn, calls the IFormattable implementation of the Temperature class.

Some methods, such as String. Format and StringBuilder. AppendFormat , support composite formatting. A composite format string is a kind of template that returns a single string that incorporates the string representation of zero, one, or more objects.

Each object is represented in the composite format string by an indexed format item. The index of the format item corresponds to the position of the object that it represents in the method's parameter list. Indexes are zero-based.