Convert类使用 C#

Convert类使用 C#  

      

Convert 将一个基本数据类型转化为另一基本数据类型。

支持的转化类型：受支持的基类型是 Boolean、Char、SByte、Byte、Int16、Int32、Int64、UInt16、UInt32、UInt64、Single、Double、Decimal、DateTime 和 String。

使用实例：

double dNumber = 23.15;
try {
    // Returns 23
    int    iNumber = System.Convert.ToInt32(dNumber);
}
catch (System.OverflowException) {
    System.Console.WriteLine(
                "Overflow in double to int conversion.");
}
// Returns True
bool   bNumber = System.Convert.ToBoolean(dNumber);
// Returns "23.15"
string strNumber = System.Convert.ToString(dNumber);
try {
    // Returns '2'
    char chrNumber = System.Convert.ToChar(strNumber[0]);
}
catch (System.ArgumentNullException) {
    System.Console.WriteLine("String is null");
}
catch (System.FormatException) {
    System.Console.WriteLine("String length is greater than 1.");
}
// System.Console.ReadLine() returns a string and it
// must be converted.
int newInteger = 0;
try {
    System.Console.WriteLine("Enter an integer:");
    newInteger = System.Convert.ToInt32(
                        System.Console.ReadLine());
}
catch (System.ArgumentNullException) {
    System.Console.WriteLine("String is null.");
}
catch (System.FormatException) {
    System.Console.WriteLine("String does not consist of an " +
                    "optional sign followed by a series of digits.");
}
catch (System.OverflowException) {
    System.Console.WriteLine(
    "Overflow in string to int conversion.");
}
System.Console.WriteLine("Your integer as a double is {0}",
                         System.Convert.ToDouble(newInteger));