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Editorial Team
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Asked: 2026-06-08T18:08:11+00:00

I have one web application, having one table in oracle10g having following structure: Column

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I have one web application, having one table in oracle10g having following structure:

Column Name       DataType
UserImage         long

My problem is that how should I display the IMAGE on my aspx page which is stored in long format?

If data type is BLOB or CLOB then it could be easier one, but it’s stored in long.

I could not change the datatype since this is third party DB.

Please suggest me how could I achieve this. The solution could be either using Oracle or C#, I’m fine with both.

Thanks in advance.

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1 Answer

  1. Editorial Team

    The “chunk” characters you have posted seem to be a TIFF image. That gives an idea how the images are stored. In fact, the binary image data seems to be stored as character data. That’s certainly completely unsupported and very fragile. I’d recommend converting it as soon as possible.

    In the mean time, I can propose two ways of retrieving the data so I cannot guarantee that either one works.

    But approaches are susceptible to characters sets: If two or more character sets are involved, your data will be converted and thereby destroyed. And both are susceptible to the maximum length of certain data types.

    Approach 1:

    Try to go via the RAW data type and retrieve it as a byte array. It’s certainly limited to 32’000 characters, maybe even less.

    SELECT UTL_RAW.CAST_TO_RAW(UserImage) FROM UNNAMED_TABLE WHERE ...

    On the C# side, you should get an OracleBinary or byte[] instance.

    Approach 2:

    Try to retrieve it as a string. Then convert the string into a byte array using the original encoding (Encoding.GetBytes. With enough luck, the original data can be restored.

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