How to convert 64Based Data to string in C#?

Ravi Sangtani

10y1.6kVisual Basic .NET

Hello,

I have 64-Based Url I want to convert it into string

Please Help me

Thank You

22 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vivek Kumar10y ago
Hi Ravi,
This is the image and in that image this number is printed "045548279" . So If you have to read that number from image and then you can save that number in your database.

You can go through the below link and also download the sample code for your reference.

http://www.aspsnippets.com/Articles/Read-Extract-Text-from-Image-OCR-in-ASPNet-using-C-and-VBNet.aspx

http://www.codeproject.com/Articles/10130/OCR-with-Microsoft-Office

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Ravi Sangtani10y ago
Hi Joginder

I want to save that image text in my database as string "045548279".
Please help me...
Joginder Banger10y ago
Hi Ravi,

As per my knowledge its return of image. In image have no . is that correct.
What you want i have lot of working convert image as well as.
Vivek Kumar10y ago
Hi Ravi,

It is an image not a number.

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Ravi Sangtani10y ago
Hi Vivek,

I want to save that no as string in database
Vivek Kumar10y ago
You can save all string in database or save image in any folder.
What you want to do in manually? If you will give me your requirement then i can try to find the exact solution.
Ravi Sangtani10y ago
But how to do that i have lakhs of that string and manually how can do ?
Vivek Kumar10y ago
Hi Ravi,

This is not your answer 045548279. Actually it is an image which is showing that number and you can use this base 64 data as plan text in C#
Ravi Sangtani10y ago
I want that result as plan text not an Image
you see in browser that is .png image
Vivek Kumar10y ago
Yes Ravi,
That's why i m getting the result as PNG when i am decoding it.
could you tell me what is your requirement ?
Ravi Sangtani10y ago
I also can't get the proper code but ans is 045548279
if you want to check then open this 64basedstring in browser and see the output that i want in string but this is image

the 64basedstring is :

data:image/png;base64, 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
Rajeev Punhani10y ago
Hi Ravi,
Could you tell how you are encoding the data.
Vivek Kumar10y ago
How you are encoding your data?
my ans is PNG.
Ravi Sangtani10y ago
Ans is : 045548279 of above Based64 string which I have give
what is your ans is their ?
Vivek Kumar10y ago
Hi Ravi,
I checked in my system it is giving PNG as string.
Could you tell me how you are converting URL to base 64 or you are getting base 64 string from any other source ?
Ravi Sangtani10y ago
No still not proper working...
Vivek Kumar10y ago
Please Use below method

public static string FromBase64ForUrlString(string base64ForUrlInput)
{
int padChars = (base64ForUrlInput.Length % 4) == 0 ? 0 : (4 - (base64ForUrlInput.Length % 4));
StringBuilder result = new StringBuilder(base64ForUrlInput, base64ForUrlInput.Length + padChars);
result.Append(String.Empty.PadRight(padChars, '='));
result.Replace('-', '+');
result.Replace('_', '/');
byte[] b= Convert.FromBase64String(result.ToString());
return Encoding.UTF8.GetString(b);
}
Ravi Sangtani10y ago
I have my string as

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

It is 64based i want to convert it in the string format...
Vivek Kumar10y ago
Is URL string is null?
Vivek Kumar10y ago
What are you using in your code. Can you share your code?
Ravi Sangtani10y ago
Error :
An unhandled exception of type 'System.ArgumentNullException' occurred in mscorlib.dll
Additional information: Array cannot be null.
Vivek Kumar10y ago
Hi Ravi,

Please use below method/code for decode the base 64 URl to string

public static string Base64ForUrlDecode(string str)
{
byte[] decbuff = HttpServerUtility.UrlTokenDecode(str);
return Encoding.UTF8.GetString(decbuff);
}

let me know if you want any other things.

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