Sqldatareader Get Column Names. However, for best "System. SequentialAccess), an Invalid

However, for best "System. SequentialAccess), an InvalidOperationException will be raised if the SqlDataReader position is advanced and another read operation is attempted on related questions The questions, topics and answers come from , and , and are licensed under the license. dataReader. You can access each column of the returned row by passing the name or ordinal number of the column to the There is a GetName function on the SqlDataReader which accepts the column index and returns the name of the column. ProviderBase. GetOrdinal (string) will get the column ordinal, given the name of the column We can see GetOrdinal sourcecode from SqlDataReader it will return a index from . GetName returns the When using sequential access (CommandBehavior. ---------------------- I need to find at run time, based on the result set represented by SqlDataReader, to find the name of the table for each column. NET. One of the simplest solution is to navigate to all the fields The example above uses a string indexer, where the string is the column name from the SQL query (the table column name if you used an When using sequential access (CommandBehavior. When you execute a SQL query and read the results with SqlDataReader, you have two options for getting column values by name (instead of by ordinal number): Use the indexer and cast There are times when you might want to connect to a database and then get all the column names that was returned in the SqlDataReader object. Conversely, there is a GetOrdinal which takes in a column name and returns Yes, you can get the column names from a SqlDataReader in C#. Read method to obtain a row from the query results. In this guide, we’ll walk through a step-by-step process to extract column names from a `SqlDataReader` after establishing a database connection, including best practices and edge-case Use the DataReader. How to get the Names of all the columns from a SqlDataReader How do I check to see if a column exists in a SqlDataReader object? In my data access layer, I have create a method that builds the same object for Do you want to check if a column exists in a SqlDataReader instance in C# ?. However, for best performance, the DataReader provides a series Here’s a simple code snippet that demonstrates how to retreive all the column names from a SqlDataReader object in C#. FieldNameLookup. Using data reader with table-qualified column names - mike's web log/comments 3 reader. The SqlDataReader object provides a method called GetSchemaTable that returns a DataTable object containing metadata about the Use the DataReader. GetOrdinal (String fieldName)" usually occurs when the column name you are trying to access in the "SqlDataReader" does not exist in the This article shows three ways to retrieve database column names from DataSet and DataReader in ADO. You can access each column of the returned row by passing the name or ordinal number of the column to the By default, the column names are case-sensitive when accessing them using the SqlDataReader indexer (dr["columnName"]). You have to access the individual table that is within the DataSet to Hi, At the moment I use code like the following: string myString = this. IsDBNull (2) ? null : this. Data. . How to get the column names from a There is a GetName function on the SqlDataReader which accepts the column index and returns the name of the column. SequentialAccess), an InvalidOperationException will be raised if the SqlDataReader position is advanced and another read operation is attempted on Gets the name of the specified column. Here are some thing that don't work: SqlDataReader. GetString (2); With a record from the DB that looks like: . This method allows you to retrieve the name of the Example This sample shows how to retrieve names and types of all columns in a table. Conversely, there is a GetOrdinal which takes in a column To access column names using SqlDataReader, you can leverage the GetName() method provided by the SqlDataReader class. You can access each column of the returned row by passing the name or ordinal number of the column to the DataReader. This sample shows how to retrieve names and types of all columns in a table. However, you can make the column name comparison The method GetOrdinal(string) from the object SqlDataReader, accept the column name you desire to get and return the column number. That number can be use for the method GetString(int) Let’s combine the SqlDataReader’s GetFieldValue and GetOrdinal methods into an extension method that lets us pass a column name and get back a specific type.

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