AppSettingsReader.GetValue(String, Type) Method
Definition
Important
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Gets the value for a specified key from the AppSettings property and returns an object of the specified type containing the value from the configuration.
public:
System::Object ^ GetValue(System::String ^ key, Type ^ type);
public object GetValue (string key, Type type);
member this.GetValue : string * Type -> obj
Public Function GetValue (key As String, type As Type) As Object
Parameters
- key
- String
The key for which to get the value.
- type
- Type
The type of the object to return.
Returns
The value of the specified key.
Exceptions
key
does not exist in the <appSettings>
configuration section.
-or-
The value in the <appSettings>
configuration section for key
is not of type type
.
Examples
The following example shows how to use the GetValue method to retrieve the value for each key in the <appSettings>
section of the configuration file.
static void DisplayAppSettings()
{
try
{
var reader = new AppSettingsReader();
NameValueCollection appSettings = ConfigurationManager.AppSettings;
for (int i = 0; i < appSettings.Count; i++)
{
string key = appSettings.GetKey(i);
string value = (string)reader.GetValue(key, typeof(string));
Console.WriteLine("Key : {0} Value: {1}", key, value);
}
}
catch (ConfigurationErrorsException e)
{
Console.WriteLine("[DisplayAppSettings: {0}]", e.ToString());
}
}
Private Shared Sub DisplayAppSettings()
Try
Dim reader As New AppSettingsReader()
Dim appSettings As NameValueCollection = ConfigurationManager.AppSettings
For i As Integer = 0 To appSettings.Count - 1
Dim key As String = appSettings.GetKey(i)
Dim value As String = reader.GetValue(key, GetType(String))
Console.WriteLine("Key : {0} Value: {1}", key, value)
Next i
Catch e As ConfigurationErrorsException
Console.WriteLine("[DisplayAppSettings: {0}]", e.ToString())
End Try
End Sub
Applies to
See also
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