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Accessing AA .dbf files from a .net console application

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  • Accessing AA .dbf files from a .net console application

    I have a need to generate a report from a .net console application, and want to pull from our Alpha Anywhere .dbf files for some of the data. I thought I should be able to use the standard Jet database engine, like the code below. I'm getting an "external table is not in the correct format" error when trying to fill my dataset. Does anyone have any experience doing this and know what is the best practices way of reading from the .dbf files from a .net app? Here is my simple code snippet:

    string connectionString = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:\\myPath; Extended Properties=DBASE IV;";
    using (OleDbConnection conn = new OleDbConnection(connectionString))
    {
    conn.Open();
    var sql = "select * from myTable";
    OleDbDataAdapter da = new OleDbDataAdapter(sql, conn);

    DataSet ds = new DataSet();
    da.Fill(ds);
    }

  • #2
    Re: Accessing AA .dbf files from a .net console application

    Similar? https://www.alphasoftware.com/alphaf...ccess-database
    There can be only one.

    Comment


    • #3
      Re: Accessing AA .dbf files from a .net console application

      Steve,
      These work. Pretty self explanatory. Be careful how many objects you include in the data set. I use VS 2013 and anything more that 20 locks it up (VS).
      pict2.jpgpict1.jpg

      Comment


      • #4
        Re: Accessing AA .dbf files from a .net console application

        Thanks...those are great examples.

        After a little more testing, the issue seems to be with the JPEG image column that I have in the table. The data adapter fills fine when there are no image columns in the table, but doesn't seem to be able to handle the image column without the "external table is not in the expected format" error. Have you been successful working with image columns? I can default to the image column pointing to the filename of the image, but wanted to pull the image straight from the database.

        Thanks again,
        Steve

        Comment


        • #5
          Re: Accessing AA .dbf files from a .net console application

          Steve,

          What do you mean by "pull the images straight from the database.?" Do you want to view them from another database. (If so which one) Simply view them on a screen.(If so which app to view them). Save them to a different format, so on and so on.

          Regards
          JM

          Comment


          • #6
            Re: Accessing AA .dbf files from a .net console application

            I want to run a .Net console application, read the records from the .dbf file, and generate a PDF file from the records. I'm able to connect to the .dbf file as long as there are no image fields in the table, but when there are image fields in the table I'm unable to connect to the .dbf file.

            Comment


            • #7
              Re: Accessing AA .dbf files from a .net console application

              Steve,
              If what your wanting to do is generate a pdf file from the A5 db why do you not create a report in A5 (with the data and images). Save it to a pdf (in A5) file and view it with what ever pdf viewer you want.

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