oledbconnection

Help with a OleDB connection string for excel files

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Unfortunately, you can’t set ImportMixedTypes or TypeGuessRows from the connection string since those settings are defined in the registry. For the ACE OleDb driver, they’re stored at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\14.0\Access Connectivity Engine\Engines\Excel in the registry. So, you can simplify your connection string to: conn.ConnectionString = @”Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Nick\Desktop\Pricing2.xlsx;Extended Properties=””Excel 12.0 Xml;HDR=Yes;IMEX=1;”””; Once you set TypeGuessRows to 0 and … Read more

JSON.net serialize directly from oledbconnection

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Firstly, you should stop serializing to an intermediate string and instead serialize directly to the HttpResponse.OutputStream, using the following simple methods: public static class JsonExtensions { public static void SerializeToStream(object value, System.Web.HttpResponse response, JsonSerializerSettings settings = null) { if (response == null) throw new ArgumentNullException(“response”); SerializeToStream(value, response.OutputStream, settings); } public static void SerializeToStream(object value, TextWriter … Read more

Parsing CSV using OleDb using C#

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You should indicate only the directory name in your connection string. The file name will be used to query: var filename = @”c:\work\test.csv”; var connString = string.Format( @”Provider=Microsoft.Jet.OleDb.4.0; Data Source={0};Extended Properties=””Text;HDR=YES;FMT=Delimited”””, Path.GetDirectoryName(filename) ); using (var conn = new OleDbConnection(connString)) { conn.Open(); var query = “SELECT * FROM [” + Path.GetFileName(filename) + “]”; using (var adapter … Read more

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