DbConnectionStringBuilder.ContainsKey Method
.NET Framework 4.5
Determines whether the DbConnectionStringBuilder contains a specific key.
Assembly: System.Data (in System.Data.dll)
Parameters
- keyword
- Type: System.String
The key to locate in the DbConnectionStringBuilder.
Return Value
Type: System.Booleantrue if the DbConnectionStringBuilder contains an entry with the specified key; otherwise false.
| Exception | Condition |
|---|---|
| ArgumentNullException | keyword is a null reference (Nothing in Visual Basic). |
static void Main() { DbConnectionStringBuilder builder = new DbConnectionStringBuilder(); builder.Add("Provider", "Provider=Microsoft.Jet.OLEDB.4.0"); builder.Add("Data Source", "C:\\ThisExcelWorkbook.xls"); builder.Add("Extended Properties", "Excel 8.0;HDR=Yes;IMEX=1"); // Displays the values in the DbConnectionStringBuilder. Console.WriteLine("Contents of the DbConnectionStringBuilder:"); Console.WriteLine(builder.ConnectionString); // Searches for a key. if (builder.ContainsKey("Data Source")) { Console.WriteLine("The collection contains the key \"Data Source\"."); } else { Console.WriteLine("The collection does not contain the key \"Data Source\"."); } Console.ReadLine(); }
This code produces the following output:
Contents of the DbConnectionStringBuilder: provider="Provider=Microsoft.Jet.OLEDB.4.0";data source=C:\MyExcel.xls;extended properties="Excel 8.0;HDR=Yes;IMEX=1" The collection contains the key "Data Source".
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
