What is difference between ExecuteReader, ExecuteNonQuery and ExecuteScalar ?
ExecuteReader : Use for accessing data. It provides a forward-only,read-only,connected recordset.
ExecuteNonQuery : Use for data manipulation, such as Insert, Update, Delete.
ExecuteScalar : Use for retrieving 1 row 1 col. value., i.e. Single value. eg: for retrieving aggregate function. It is faster than other ways of retrieving a single value from Database.
Showing posts with label ExecuteNonQuery and ExecuteScalar.. Show all posts
Showing posts with label ExecuteNonQuery and ExecuteScalar.. Show all posts
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// Export Datatable to Excel in C# Windows application using System; using System.Data; using System.IO; using System.Windows.Forms; ...
