Question

c#中怎样将16进制转换成十进制

Answer 1

1、Convert.ToInt32("FF", 16)
2、如果转换的数值太大防止溢出也可Convert.ToInt64("数值", 16)
3、第三种
/// <summary>
/// 十六进制换算为十进制
/// </summary>
/// <param name="strColorValue"></param>
/// <returns></returns>
public static int GetHexadecimalValue(String strColorValue)
{
char[] nums = strColorValue.ToCharArray();
int total = 0;
try
{
for (int i = 0; i < nums.Length; i++)
{
String strNum = nums[i].ToString().ToUpper();
switch (strNum)
{
case "A":
strNum = "10";
break;
case "B":
strNum = "11";
break;
case "C":
strNum = "12";
break;
case "D":
strNum = "13";
break;
case "E":
strNum = "14";
break;
case "F":
strNum = "15";
break;
default:
break;
}
double power = Math.Pow(16, Convert.ToDouble(nums.Length - i - 1));
total += Convert.ToInt32(strNum) * Convert.ToInt32(power);
}

}
catch (System.Exception ex)
{
String strErorr = ex.ToString();
return 0;
}

return total;
}

Answer 2

int b= Int32.Parse("266", System.Globalization.NumberStyles.HexNumber);