


Call a stored procedure with return value in C#
A common need when accessing a database is to call stored procedures from an application, especially those that return numeric values. This article demonstrates how to use ADO.NET to call a stored procedure that returns an integer value and retrieve the result in a C# application.
Stored Procedure
Consider the stored procedure usp_GetNewSeqVal
which retrieves the next value of a sequence given a sequence name. It receives the @SeqName
parameter as input and returns the new sequence value.
C# code
In order to call this stored procedure and retrieve the return value, we can use the following code:
using (SqlConnection conn = new SqlConnection(getConnectionString())) using (SqlCommand cmd = conn.CreateCommand()) { cmd.CommandText = parameterStatement.getQuery(); cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.AddWithValue("@SeqName", "SeqNameValue"); // @ReturnVal 可以是任何名称 var returnParameter = cmd.Parameters.Add("@ReturnVal", SqlDbType.Int); returnParameter.Direction = ParameterDirection.ReturnValue; conn.Open(); cmd.ExecuteNonQuery(); var result = returnParameter.Value; }
Key details
-
SqlCommand
Configure with the correct command text and type. - Input parameters
@SeqName
are added to the command. - Add a new parameter
@ReturnVal
with its direction set toParameterDirection.ReturnValue
. This instructs the command to create a variable in the stored procedure and assign the return value to it. - The connection is opened and the query is executed using
ExecuteNonQuery
. - Finally, the return value can be retrieved from the
returnParameter.Value
attribute.
The above is the detailed content of How to Retrieve a Return Value from a Stored Procedure in C# using ADO.NET?. For more information, please follow other related articles on the PHP Chinese website!

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