c#中int 转string 16进制和16转double的方法

答案：0x开头的16进制没有负数和小数

#region change hex to double

private Double HexConverToDouble(string hexString)

{

if (hexString == "")

{

return 0;

}

string data;

if (hexString.StartsWith("0x"))

{

data = hexString.Substring(2);

}

else

{

data = hexString;

}

char[] eachData = data.ToCharArray();

Double result = 0;

for (int i = 0; i < eachData.Length; i++)

{


char charValue = eachData[i];//eachData[m];

Double x = 16;//如果是八进制则写成8就可以

Double y = System.Convert.ToDouble(eachData.Length - i - 1);

switch (charValue)

{

case '0':

break;

case '1':

result += 1 * Math.Pow(x,y);

break;

case '2':

result += 2 * Math.Pow(x,y);

break;

case '3':

result += 3 * Math.Pow(x,y);

break;

case '4':

result += 4 * Math.Pow(x,y);

break;

case '5':

result += 5 * Math.Pow(x,y);

break;

case '6':

result += 6 * Math.Pow(x,y);

break;

case '7':

result += 7 * Math.Pow(x,y);

break;

case '8':

result += 8 * Math.Pow(x,y);

break;

case '9':

result += 9 * Math.Pow(x,y);

break;

case 'A':

result += 10 * Math.Pow(x,y);

break;

case 'B':

result += 11 * Math.Pow(x,y);

break;

case 'C':

result += 12 * Math.Pow(x,y);

break;

case 'D':

result += 13 * Math.Pow(x,y);

break;

case 'E':

result += 14 * Math.Pow(x,y);

break;

case 'F':

result += 15 * Math.Pow(x,y);

break;

case 'a':

result += 10 * Math.Pow(x,y);

break;

case 'b':

result += 11 * Math.Pow(x,y);

break;

case 'c':

result += 12 * Math.Pow(x,y);

break;

case 'd':

result += 13 * Math.Pow(x,y);

break;

case 'e':

result += 14 * Math.Pow(x,y);

break;

case 'f':

result += 15 * Math.Pow(x,y);

break;

default :

break;

}


}

return result;

}

#region convert the int32 to hex(string) //这个方法通用性不好，只能是int的转string的16进制

private string specInttoString(int source)//被主要方法调用的一个辅助方法

{

if(source <10)

{

return source.ToString();

}

else

{

switch(source)

{

case 10:

return "A";

case 11:

return "B";

case 12:

return "C";

case 13:

return "D";

case 14:

return "E";

case 15:

return "F";

default:

return "";

}

}


}

private string INTtoHEx(int source)//主要方法

{

if(source <10)

{

return "0x" + source.ToString();

}

else if (source <=15)

{

return "0x" + specInttoString(source);

}



else

{

int raiseNum = 16;

int addNum = 16;

int positionNum = 1;

while((source - addNum) >= 0)

{

positionNum++;

addNum = addNum * raiseNum;

}

int[] valuePositionNum = new int[positionNum];

for(int i = 0;i 

{

valuePositionNum[i] = 0;

}

int[] valueAddNum = new int[positionNum];

for(int i = 0;i 

{

valueAddNum[i] = Convert.ToInt32( Math.Pow(raiseNum,i));

}

int[] decreaseSource = new int[positionNum];

decreaseSource[positionNum -1] = source;

for(int i = positionNum -1;i>=0;i--)

{

while((decreaseSource[i] - valueAddNum[i] ) >=0)

{

if(i != 0)

decreaseSource[i -1] = decreaseSource[i] - valueAddNum[i] ;

valuePositionNum[i]++;

valueAddNum[i]= valueAddNum[i] +Convert.ToInt32( Math.Pow(raiseNum,i));

}

}

string[] stringValuePositionNum = new string[positionNum];

for(int i = 0;i 

{

stringValuePositionNum[i] = specInttoString(valuePositionNum[i]);

}

string result = "0x";

for(int i = positionNum -1;i>=0;i--)

{

result = result + stringValuePositionNum[i];

}

return result;

// string[] hexList = new string[positionNum + 1];

// hexList[positionNum] = specInttoString(positionNum); 

}

}

#endregion

#endregion
 
 

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