C# | Convert。至特定(字符串、表单提供者)方法
原文:https://www . geeksforgeeks . org/c-sharp-convert-to decimal string-iformat provider-method/
此方法用于使用指定的区域性特定格式信息，将数字的指定字符串表示形式转换为等效的十进制数。
语法:
public static decimal ToDecimal (string value, IFormatProvider provider);
参数:
- 值:是包含要转换的数字的字符串。
- 提供程序:它是一个提供区域性特定格式信息的对象。
返回值:该方法返回一个十进制数，该十进制数相当于数值中的数字，如果数值为空，则返回 0(零)。 T3】例外:
- 格式异常:如果值不是有效格式的数字。
- overoverowexception:如果值代表小于最小值或大于最大值的数字。
以下程序说明了转换的使用。方法: T3】例 1:
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate the
// Convert.ToDecimal() Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of CultureInfo
CultureInfo cultures = new CultureInfo("en-US");
// declaring and initializing String array
string[] values = {"123456789", "12345.6789",
"123,456,789.0123"};
// calling get() Method
Console.WriteLine("Converted decimal value "+
"of specified strings: ");
for (int j = 0; j < values.Length; j++) {
get(values[j], cultures);
}
}
catch (FormatException e) {
Console.WriteLine("\n");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (OverflowException e) {
Console.WriteLine("\n");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining get() method
public static void get(string s,
CultureInfo cultures)
{
// converting string to specified char
decimal val = Convert.ToDecimal(s, cultures);
// display the converted char value
Console.Write(" {0}, ", val);
}
}
Output:
Converted decimal value of specified strings:
123456789, 12345.6789, 123456789.0123,
例 2: 为格式异常
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate the
// Convert.ToDecimal() Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of CultureInfo
CultureInfo cultures = new CultureInfo("en-US");
// declaring and initializing String array
string[] values = {"123456789", "12345.6789",
"123,456,789.0123"};
// calling get() Method
Console.WriteLine("Converted decimal value"+
" of specified strings: ");
for (int j = 0; j < values.Length; j++) {
get(values[j], cultures);
}
Console.WriteLine("\n");
string s = "123 456, 789";
Console.WriteLine("format of s is invalid ");
// converting string to specified char
decimal val = Convert.ToDecimal(s, cultures);
// display the converted char value
Console.Write(" {0}, ", val);
}
catch (FormatException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (OverflowException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining get() method
public static void get(string s,
CultureInfo cultures)
{
// converting string to
// specified decimal value
decimal val = Convert.ToDecimal(s, cultures);
// display the converted decimal value
Console.Write(" {0}, ", val);
}
}
Output:
Converted decimal value of specified strings:
123456789, 12345.6789, 123456789.0123,
format of s is invalid
Exception Thrown: System.FormatException
例 3: 适用于飞越异常
c sharp . c sharp . c sharp . c sharp
// C# program to demonstrate the
// Convert.ToDecimal() Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// creating object of CultureInfo
CultureInfo cultures = new CultureInfo("en-US");
// declaring and initializing String array
string[] values = {"123456789", "12345.6789",
"123,456,789.0123"};
// calling get() Method
Console.WriteLine("Converted decimal value "+
"of specified strings: ");
for (int j = 0; j < values.Length; j++) {
get(values[j], cultures);
}
Console.WriteLine("\n");
string s = "-7922816251426433759354395033500000";
Console.WriteLine("s is less than the MinValue");
// converting string to specified char
decimal val = Convert.ToDecimal(s, cultures);
// display the converted char value
Console.Write(" {0}, ", val);
}
catch (FormatException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (OverflowException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining get() method
public static void get(string s,
CultureInfo cultures)
{
// converting string to
// specified decimal value
decimal val = Convert.ToDecimal(s, cultures);
// display the converted decimal value
Console.Write(" {0}, ", val);
}
}
Output:
Converted decimal value of specified strings:
123456789, 12345.6789, 123456789.0123,
s is less than the MinValue
Exception Thrown: System.OverflowException
参考:
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