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Yes. Silly of me.
This is because you are declaring the enum inside your class.
Try changing public enum ColumnType to public enum ColumnTypes (all I've done is add an 's') making sure to change all the references to it. I suggest doing this by using the Refactor|Rename context menu option.
If this works, and I think it will, you might consider moving the enum declaration outside the class, unless it will only ever be used within the class.
e.g.
Instead of
<br />
public partial class MyClass<br />
{<br />
public enum MyEnum<br />
{<br />
.....<br />
.....<br />
}<br />
<br />
.........<br />
.........<br />
.........<br />
}<br />
to:
<br />
public enum MyEnum<br />
{<br />
.....<br />
.....<br />
}<br />
<br />
public partial class MyClass<br />
{<br />
<br />
.........<br />
.........<br />
.........<br />
}<br />
Honi soit qui mal y pongs - Evil to he who thinks it stinks
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Yes, moving the enum outside of my class is the way to go.
Please accept to grateful thanks. I had got myself into a pickle 
Now back to weaving the magic ...
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Pleased I could help.
Incidentally, you should be congratulated for posting a question with source code. It makes it sooooo much easier to formulate a response. Other CPians considering asking for help should follow your example.
Honi soit qui mal y pongs - Evil to he who thinks it stinks
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hi all
I have an application...in that am taking snap from webcam and saving it to the databse...
In sql databse the path is saving...the picture is saving in to the bin folder of the application
and that path is saving to databse.....
is it possible to create a folder in the application like "Images" and save the images in this folder?
one more doubt
how will i take this image in crystal report?..
if am stroring the image as binary,its working fine....but it is taking lots of memory...so i want to change like this....
can anybody help me to overcome this issue?....
any help is appreciated in advance....
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HI,
Please guide me to convert PPT files to JPEG files.
Thanks in advance...
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You can create a Virtual Printer from which you can get the EMF version of your PPT.
Then use GDI+ to load this EMF and save it as JPEG.
«_Superman_»
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hello everyone,
i am using ms-access database to store special character corresponding hexavalue.The special character is 1409 with hexavalue. when user open the html file the special charcter shuld be replaced with hexavalue.
i am using this code to match with database....
string aaa = xx.ToString();
int stat = 0;
OleDbConnection mycon = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\\Documents and Settings\\Administrator\\Desktop\\Splchar.mdb;Persist Security Info=False");
OleDbCommand cmd = new OleDbCommand("select * from splchar", mycon);
try
{
mycon.Open();
OleDbDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
string xx1 = reader.GetValue(1).ToString();
stat = richTxt.Find(reader.GetValue(1).ToString(), 0, RichTextBoxFinds.MatchCase);
while (stat != -1)
{
richTxt.SelectedText = Reader.GetValue(2).ToString();
stat = richTxt.Find(reader.GetValue(1).ToString(), stat + 1, RichTextBoxFinds.MatchCase);
}
}
reader.Close();
mycon.Close();
but its did't convert properly special character to hexavalue..
Please help me...!!
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Hello everyone,
I am using the following code to generate result of MD5 to a string, my question is how to convert it to an int? The string is 16 bytes, too big for an int. 
My purpose is to get the hash code for an input string, but result in the form of an int.
string a = "Input String";
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
System.Text.Encoding enc = System.Text.Encoding.UTF8;
StringBuilder resultBuffer = new StringBuilder();
byte[] result = md5.ComputeHash(UTF8Encoding.Default.GetBytes(a));
for (int i = 0; i < result.Length; i++)
{
resultBuffer.Append(result[i].ToString("X"));
}
string resultStr = resultBuffer.ToString();
regards,
George
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Depending on what you want to use the int/hashed string for you could just make the sum off the bytes (if memory serves me right MD5 hashing returns only numeric values).
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Hi Tom,
1.
MD5 hashing returns byte[] other than numeric value in C#. Please feel free to correct me if I am wrong.
2.
"you could just make the sum off the bytes" -- interested in this. Any more details or pseudo code?
regards,
George
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George_George wrote: MD5 hashing returns byte[] other than numeric value in C#. Please feel free to correct me if I am wrong.
Like I said 'if memory serves me right' so could be been a while since I looked into the hashing.
So I could be wrong about that
(just found some code I used a while ago for the md5 hashing)
Public Shared Function GetMD5Encrypted(ByVal input As String) As String
Dim md5hasher As MD5CryptoServiceProvider = New MD5CryptoServiceProvider()
Dim hashedbytes() As Byte
Dim encoder As New UTF8Encoding()
hashedbytes = md5hasher.ComputeHash(encoder.GetBytes(input.ToCharArray()))
Dim hashedstring As String = Nothing
For Each i As Integer In hashedbytes
hashedstring = hashedstring + i.ToString
Next
Return hashedstring
End Function
(sorry about the vb.net language but you should be able to convert it)
I think this one only returns numeric values, but you might want to check that first.
George_George wrote: "you could just make the sum off the bytes" -- interested in this. Any more details or pseudo code?
Don't really have any code for it, it was just my first thought and what I would try to do first. (but if there only numeric values in the hash it's simple, if not you'll probably have to do a check if the byte is numeric or not if not you could use the Asci value of the char or something else)
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Thanks Tom,
1.
I read your VB code. It returns string other than returns int. What I want is to get int (32-bit output). Any comments?
2.
"Don't really have any code for it, it was just my first thought and what I would try to do first. (but if there only numeric values in the hash it's simple, if not you'll probably have to do a check if the byte is numeric or not if not you could use the Asci value of the char or something else)" -- I read it twice, but do not understand. It is appreciated if you could some pseudo code for this idea? Code makes everyone clear.
regards,
George
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Well like I said it's a thought and I'm not sure you'll always get a unique value out off it but here is some pseudo code anyway.
'the hashed string
String Hash="1564897548846357815";
Char c ;
Int result;
for each c in hash
if isnumeric(c) then
result = result + c
else
'do something to convert the char into an int
end if
next
Now I seriously doubt that this will work (reading the comments off other reply's to your post), but it was my first thought and you never know.
It also depends on for what you'll use the int (if it has to be unique I wouldn't do it like this).
PS: sorry if my c# code isn't perfect, been a while since I coded in it
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George_George wrote: but result in the form of an int.
Why George ?
cheers,
Abhijit
CodeProject.Com MVP
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Hi Abhijit,
It is legacy system interface limitation. It has to use 32-bit int. Any ideas to convert a string into 32-bit int? The best idea I could think of is to calculate hashing for the input string. But the hashing result is not 32-bit, so I am thinking about how to convert it...
Any comments or ideas?
regards,
George
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Don't know if you've sorted this or not George but thought I'd throw in my 2c worth.
As you know MD5 is 128bit (16 bytes) so there's no way of getting a unique value into an Int32. The same applies to Int64.GetHashCode() method - if you test it, you'll find you will get identical results for different values as it's impossible to make 64 fit into 32.
There are 32 bit hash algorithms out there - if it's just for file checking etc then it will be good enough, but if it's for security then forget it. If it's just for the sake of turning an arbitary string into an int then use GetHashCode() on your string.
DaveBTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
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Thanks Dave,
I can not use GetHashCode because for different CLR versions, the same content will return different results.
I think if there could be a hashing algorithm which returns 32-bit result, it will be great! But I can not find a built-in one in CLR library. Do you know whether there is a built-in one?
regards,
George
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Have a look at this[^]. Be sure to check out the very last coment on the page as it could be important.
DaveBTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
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Perhapse this?
string a = "Input String";
MD5 crypto = MD5.Create();
byte[] rawHash = crypto.ComputeHash(UTF32Encoding.Default.GetBytes(a));
Guid guid = new Guid(rawHash);
int hash = guid.GetHashCode();
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Hi Jon,
Sorry I can not use GetHashCode because different CLR version will return different result for GetHashCode for the same input content.
Any comments or other new ideas?
regards,
George
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You can generate your own hash:
string a = "Input String";
MD5 crypto = MD5.Create();
byte[] rawHash = crypto.ComputeHash(UTF32Encoding.Default.GetBytes(a));
Guid guid = new Guid(rawHash);
int hash = 0;
for (int i=0; i<16; i+=4)
{
hash ^= (rawGuid[i] << 24) | (rawGuid[i+1] << 16) | (rawGuid[i+2] << 8) | rawGuid[i+3];
}
return hash;
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See How to get MD5 hash in C# . NET[^].
Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )
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hello,
i have created a setup for my application that instance a database into sql server.
when adding some features to my project i have changed some tables and some columns in my database.
My problem is that: how to update the database in my setup without overwriting the existing database and also do not losing the data.
any help is appreciated.
regards
dghdfghdfghdfghdgh
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Instead of installing a database during an upgrade setup you should create a script which adds/updated/removes the rows/columns/tables to datatabase.
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Hi ellie,
you could try to use a sql-script that looks like this:
<br />
IF NOT EXISTS (SELECT COLUMN_NAME FROM syscolumns WHERE COLUMN_NAME = 'MyColumn') THEN<br />
ALTER TABLE ADD COLUMN MyColumn varchar(256) NULL;<br />
END IF<br />
You can use this style for tables, triggers, columns etc.
During your installation you can execute this script.
Hope this helps you.
Regards
Sebastian
P.S.: Be sure to modify the sql-code above to the grammar of your sql server.
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