SqlConnectionStringBuilder.Item[String] Property

Reference

Definition

Namespace:: System.Data.SqlClient

Assembly:: System.Data.SqlClient.dll

Assembly:: System.Data.dll

Package:: System.Data.SqlClient v4.9.0

Source:: System.Data.SqlClient.notsupported.cs

Important

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Gets or sets the value associated with the specified key. In C#, this property is the indexer.

public:
 virtual property System::Object ^ default[System::String ^] { System::Object ^ get(System::String ^ keyword); void set(System::String ^ keyword, System::Object ^ value); };

public override object this[string keyword] { get; set; }

member this.Item(string) : obj with get, set

Default Public Overrides Property Item(keyword As String) As Object

Parameters

keyword: String

The key of the item to get or set.

Property Value

Object

The value associated with the specified key.

Exceptions

ArgumentNullException

keyword is a null reference (Nothing in Visual Basic).

KeyNotFoundException

Tried to add a key that does not exist within the available keys.

FormatException

Invalid value within the connection string (specifically, a Boolean or numeric value was expected but not supplied).

Examples

The following code, in a console application, creates a new SqlConnectionStringBuilder and adds key/value pairs to its connection string, using the Item[] property.

class Program
{
    static void Main()
    {
        SqlConnectionStringBuilder builder =
            new SqlConnectionStringBuilder();
        builder["Data Source"] = "(local)";
        builder["Integrated Security"] = true;
        builder["Initial Catalog"] = "AdventureWorks";

        // Overwrite the existing value for the Data Source value.
        builder["Data Source"] = ".";

        Console.WriteLine(builder.ConnectionString);
        Console.WriteLine();
        Console.WriteLine("Press Enter to continue.");
        Console.ReadLine();
    }
}

Module Module1
    Sub Main()
        Dim builder As New SqlConnectionStringBuilder
        builder.Item("Data Source") = "(local)"
        ' Item is the default property, so 
        ' you needn't include it in the reference.
        builder("Integrated Security") = True
        builder.Item("Initial Catalog") = "AdventureWorks"

        ' Overwrite the existing value for the Data Source value.
        builder.Item("Data Source") = "."

        Console.WriteLine(builder.ConnectionString)
        Console.WriteLine()
        Console.WriteLine("Press Enter to continue.")
        Console.ReadLine()
    End Sub
End Module

Remarks

Because the SqlConnectionStringBuilder contains a fixed-size dictionary, trying to add a key that does not exist within the dictionary throws a KeyNotFoundException.

Applies to

Product	Versions
.NET	Core 1.0, Core 1.1, 6 (package-provided), 7 (package-provided), 8 (package-provided), 9 (package-provided), 10 (package-provided)
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0 (package-provided)

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