C# | Convert。ToInt32(字符串，表单提供者)方法
原文:https://www . geesforgeks . org/c-sharp-convert-to it32 string-iformatprovider-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 32 位有符号整数。
语法:
public static int ToInt32 (string value, IFormatProvider provider);
参数:
- 值:是包含要转换的数字的字符串。
- 提供程序:提供区域性特定格式信息的对象。
返回值:该方法返回一个 32 位有符号整数，等于数值中的数字，如果数值为空，则返回 0(零)。
异常:
- 格式异常:如果值不是由可选符号后跟数字序列(0 到 9)组成。
- 溢出异常: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。ToInt32(字符串，表单提供者)方法:
例 1:
// C# program to demonstrate the
// Convert.ToInt32() 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 = {"12345", "+12345",
"-12345"};
// calling get() Method
Console.Write("Converted int 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 int
int val = Convert.ToInt32(s, cultures);
// display the converted char value
Console.Write(" {0}, ", val);
}
}
Output:
Converted int value of specified strings: 12345, 12345, -12345,
例 2: 为格式异常
// C# program to demonstrate the
// Convert.ToInt32() 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 = {"12345", "+12345",
"-12345" };
// calling get() Method
Console.WriteLine("Converted int 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
int val = Convert.ToInt32(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 int value
int val = Convert.ToInt32(s, cultures);
// display the converted int value
Console.Write(" {0}, ", val);
}
}
Output:
Converted int value of specified strings:
12345, 12345, -12345,
format of s is invalid
Exception Thrown: System.FormatException
例 3: 适用于飞越异常
// C# program to demonstrate the
// Convert.ToInt32() 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 = {"12345", "+12345",
"-12345" };
// calling get() Method
Console.WriteLine("Converted int 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
int val = Convert.ToInt32(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 int value
int val = Convert.ToInt32(s, cultures);
// display the converted int value
Console.Write(" {0}, ", val);
}
}
Output:
Converted int value of specified strings:
12345, 12345, -12345,
s is less than the MinValue
Exception Thrown: System.OverflowException
参考:
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