A new expression requires (), [], or {} after type

Question

Hi All,

during compilation i encountered this errors.

this is the line causes errors.

String

 

aChar = new string Character((char)(int)XSTRING + i + 122).toString();

 

private string ENC_PASSW(string Passwrd, string INOUT)

{

 

string result = FuncStrSpace(Passwrd,10) ;

 

string YSTRING, XSTRING ;

 

if (INOUT == "IN")

{

YSTRING =

"";

 

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

{

XSTRING = Passwrd.Substring(i,1) ;

 

//int asc = (int)XSTRING;

 

//XSTRING = asc + i + 122;

 

String aChar = new string Character((char)(int)XSTRING + i + 122).toString();

YSTRING = YSTRING + aChar;

}

}

 

return YSTRING ;

}

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MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS

Answer 1

Unfortunatelly, you haven't asked any questions... so I'll assume that your concern is why that line gives you an error.

There are 4 ways of using the new keyword (that I can think of).

- Creating a new instance: new Form()
- Creating a new array: new int[] { 1, 2 } / new int[10]
- Creating a new anonymous type: new { Name = "John" }
- Shadowing a base method: public new string ToString()

As you can see, none of them comply with what you are doing.

What is Character?

If Character is a method that returns a string, then you should use:
    String aChar = Character((char)(int)XSTRING + i + 122).toString();

But since that is what you've already done with XSTRING, I'd guess it's not.

So, please, elaborate a little further so someone can help you.

By the way, I'll repost your code formatted so that it is readable:

private string ENC_PASSW(string Passwrd, string INOUT)
{
    string result = FuncStrSpace(Passwrd,10) ;
    string YSTRING, XSTRING ;

    if (INOUT == "IN")
    {
        YSTRING = "";
    
        for (int i = 0; i <Passwrd.Length; i++)
        {
            XSTRING = Passwrd.Substring(i,1) ;
            //int asc = (int)XSTRING;
            //XSTRING = asc + i + 122;
            String aChar = new string Character((char)(int)XSTRING + i + 122).toString();
            YSTRING = YSTRING + aChar;
        }
    }
    return YSTRING ;
}

Regards,
Fernando.

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/* No comments */

Answer 2

Hi Fernando,

I try to ascii my string  then chr it.

this is the function to decrypt and encrypt in foxpro.

in foxpro i can do somehthing like this.

 YSTRING=YSTRING+CHR(ASC(XSTRING) + I + 122)

in c# i try to convert it.

the outcome must be matched so i can compare it with foxpro table.

Thanks.

---

MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS

Answer 3

In foxpro you'll have you chr and asc functions, which you don't in C#.

But don't worry, you'll get the same results by either casting to byte a char, or casting a char to byte.

(char)97 == 'a'
(byte)'a' == 97

You get the idea.

Now to get a char out of a string, instead of substringing with length 1, simply use the indexer.

string str = "Hello";
str[1] == 'e'.

Hope this guides you in the right path.

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/* No comments */

Answer 4

Hi fernando,

Thanks for your advice. Will revert to all of u it work out or not.

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MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS

Answer 5

Hi fernando,

Byte

 

bbyte = result.Substring(i, 1).+i+122 ;

i = is a looping use for each string.

let said user input "ABC" as password i will add 7 spaces to "ABC       " to be new string pass to my functions.

then from there result = "ABC       ".

so how i can ascii it to A = 188 ?

thanks.

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MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS

Answer 6

for (int i = 0; i < result.Length; i++)
{
   byte code = (byte)result[i] + 122 + i;
   // do something with b
}

That should do the trick.

In fact, the entire code, I think, would be something like this:

char[] encodedChars = new char[result.Length];
for (int i = 0; i < result.Length; i++)
{
   byte code = (byte)result[i] + 122 + i;
   encodedChars[i] = (char)code;
}
string encodedString = new string (encodedChars);

I can't test it right now, so it's up to you to fix any issues. :D

Regards.

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/* No comments */

Answer 7

Hi Fernando,

This line had error.

byte

 

code = (byte)result[i] + 122 + i;

Error 3 Cannot implicitly convert type 'int' to 'byte'. An explicit conversion exists (are you missing a cast?) 

may i know how i can solve it ?

Thanks.

---

MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS

Answer 8

Try:

byte code = (byte)((byte)result[i] + 122 + i);

Also, since C# arrays (including the string) start at 0, it should be ... + 123 + i.

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/* No comments */

Answer 9

Hi fernando,

ok ok tks.

iT solved but

encodedChars = (

char)code; causes error too.

Error 3 Cannot implicitly convert type 'char' to 'char[]' .

Thanks.

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MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS

Answer 10

I edited the code.

It's encodedChars[i]

Also, remember to change to 123 instead of 122.

I'm guessing you are enconding passwords the same way you did in foxpro. I recommend to use a whole different approach towards enconding passwords now that you have the entire .NET framework, specially the System.Security.Cryptography namespace. Search this forum, there are a lot of threads regarding passwords and encryption.

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/* No comments */

Answer 11

Hi fernando,

Yes i had changed it to 123 but the problem is i using oledb conencted to foxpro table and i need match the password entered by user match with foxpro table.

so i need using same functions developed in foxpro to c#.

thanks.

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MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS

Answer 12

Hi fernando,

Its so weird byte 124 = 190 and not 209.

in foxpro ASC(124) = 209 .

so at the end result it not match.

only the first 123 + i(0) = 208 its match.

Thanks.

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MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS

Answer 13

Hi Fernando,

so sorry its my mistake. Its correct.

Thanks.

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MCP - SQL SERVER 2k/ WINDOWS XP , VFP 6 YEARS