SqlParameterCollection Class

Definition

Namespace:

Microsoft.Data.SqlClient

Assembly:

Microsoft.Data.SqlClient.dll

Package:

Microsoft.Data.SqlClient v5.2.0

Represents a collection of parameters associated with a SqlCommand and their respective mappings to columns in a DataSet. This class cannot be inherited.

public ref class SqlParameterCollection sealed : System::Data::Common::DbParameterCollection

[System.ComponentModel.ListBindable(false)]
public sealed class SqlParameterCollection : System.Data.Common.DbParameterCollection

[<System.ComponentModel.ListBindable(false)>]
type SqlParameterCollection = class
    inherit DbParameterCollection

Public NotInheritable Class SqlParameterCollection
Inherits DbParameterCollection

Inheritance

DbParameterCollection

SqlParameterCollection

Attributes

ListBindableAttribute

Examples

The following example creates multiple instances of SqlParameter through the SqlParameterCollection collection. The parameters are used to select data within the data source and populate the DataSet. This code assumes that a DataSet and a SqlDataAdapter have already been created with the appropriate schema, commands, and connection.

using Microsoft.Data.SqlClient;
using System.Xml;
using System.Data.Common;
using System.Windows.Forms;

public class Form1 : Form
{
    protected DataSet categoriesDataSet;
    protected DataGrid dataGrid1;
    protected SqlDataAdapter categoriesAdapter;


    public void AddSqlParameters()
    {
        // ...
        // create categoriesDataSet and categoriesAdapter
        // ...

        categoriesAdapter.SelectCommand.Parameters.Add(
          "@CategoryName", SqlDbType.VarChar, 80).Value = "toasters";
        categoriesAdapter.SelectCommand.Parameters.Add(
          "@SerialNum", SqlDbType.Int).Value = 239;
        categoriesAdapter.Fill(categoriesDataSet);

    }
}

Remarks

If the command contains an ad hoc SQL statement, as opposed to a stored-procedure name, the number of the parameters in the collection must be equal to the number of parameter placeholders within the command text, or SQL Server raises an error. With a stored procedure, all the parameters declared in the stored procedure without a default value must be provided. Parameters declared with a default value are optional. This lets you specify a value other than the default.

For more information with additional sample code demonstrating how to use parameters, see Commands and Parameters.

Properties

Count	Returns an Integer that contains the number of elements in the SqlParameterCollection. Read-only.
IsFixedSize	Gets a value that indicates whether the SqlParameterCollection has a fixed size.
IsReadOnly	Gets a value that indicates whether the SqlParameterCollection is read-only.
Item[Int32]	Gets the SqlParameter at the specified index.
Item[String]	Gets the SqlParameter with the specified name.
SyncRoot	Gets an object that can be used to synchronize access to the SqlParameterCollection.

Methods

Add(Object)	Adds the specified SqlParameter object to the SqlParameterCollection.
Add(SqlParameter)	Adds the specified SqlParameter object to the SqlParameterCollection.
Add(String, SqlDbType, Int32, String)	Adds a SqlParameter to the SqlParameterCollection with the parameter name, the data type, and the column length.
Add(String, SqlDbType, Int32)	Adds a SqlParameter to the SqlParameterCollection, given the specified parameter name, SqlDbType and size.
Add(String, SqlDbType)	Adds a SqlParameter to the SqlParameterCollection given the parameter name and the data type.
AddRange(Array)	Adds an array of values to the end of the SqlParameterCollection.
AddRange(SqlParameter[])	Adds an array of SqlParameter values to the end of the SqlParameterCollection.
AddWithValue(String, Object)	Adds a value to the end of the SqlParameterCollection.
Clear()	Removes all the SqlParameter objects from the SqlParameterCollection.
Contains(Object)	Determines whether the specified Object is in this SqlParameterCollection.
Contains(SqlParameter)	Determines whether the specified SqlParameter is in this SqlParameterCollection.
Contains(String)	Determines whether the specified parameter name is in this SqlParameterCollection.
CopyTo(Array, Int32)	Copies all the elements of the current SqlParameterCollection to the specified one-dimensional Array starting at the specified destination Array index.
CopyTo(SqlParameter[], Int32)	Copies all the elements of the current SqlParameterCollection to the specified SqlParameterCollection starting at the specified destination index.
GetEnumerator()	Returns an enumerator that iterates through the SqlParameterCollection.
IndexOf(Object)	Gets the location of the specified Object within the collection.
IndexOf(SqlParameter)	Gets the location of the specified SqlParameter within the collection.
IndexOf(String)	Gets the location of the specified SqlParameter with the specified name.
Insert(Int32, Object)	Inserts an Object into the SqlParameterCollection at the specified index.
Insert(Int32, SqlParameter)	Inserts a SqlParameter object into the SqlParameterCollection at the specified index.
Remove(Object)	Removes the specified SqlParameter from the collection.
Remove(SqlParameter)	Removes the specified SqlParameter from the collection.
RemoveAt(Int32)	Removes the SqlParameter from the SqlParameterCollection at the specified index.
RemoveAt(String)	Removes the SqlParameter from the SqlParameterCollection at the specified parameter name.