Export (0) Print
Expand All

ResourceManager.GetObject Method (String)

Returns the value of the specified non-string resource.

Namespace:  System.Resources
Assembly:  mscorlib (in mscorlib.dll)

public virtual Object GetObject(
	string name
)

Parameters

name
Type: System.String

The name of the resource to get.

Return Value

Type: System.Object
The value of the resource localized for the caller's current culture settings. If an appropriate resource set exists but name cannot be found, the method returns null.

ExceptionCondition
ArgumentNullException

The name parameter is null.

MissingManifestResourceException

No usable set of localized resources has been found, and there are no default culture resources. For information about how to handle this exception, see the "Handling MissingManifestResourceException and MissingSatelliteAssemblyException Exceptions" section in the ResourceManager class topic.

MissingSatelliteAssemblyException

The default culture's resources reside in a satellite assembly that could not be found. For information about how to handle this exception, see the "Handling MissingManifestResourceException and MissingSatelliteAssemblyException Exceptions" section in the ResourceManager class topic.

The GetObject method is used to retrieve non-string resources. These include values that belong to primitive data types such as Int32 or Double, bitmaps (such as a System.Drawing.Bitmap object), or custom serialized objects. Typically, the returned object must be cast (in C#) or converted (in Visual Basic) to an object of the appropriate type.

The returned resource is localized for the UI culture of the current thread, which is defined by the CultureInfo.CurrentUICulture property. If the resource is not localized for that culture, the resource manager uses fallback rules to load an appropriate resource. If no usable set of localized resources is found, the ResourceManager falls back on the default culture's resources. If a resource set for the default culture is not found, the method throws a MissingManifestResourceException exception or, if the resource set is expected to reside in a satellite assembly, a MissingSatelliteAssemblyException exception. If the resource manager can load an appropriate resource set but cannot find a resource named name, the method returns null.

The IgnoreCase property determines whether the comparison of name with the names of resources is case-insensitive (the default) or case-sensitive.

Caution noteCaution

This method can throw more exceptions than are listed. One reason this might occur is if a method that this method calls throws an exception. For example, a FileLoadException exception might be thrown if an error was made deploying or installing a satellite assembly, or a SerializationException exception might be thrown if a user-defined type throws a user-defined exception when the type is deserialized.

Performance Considerations

If you call the GetObject method multiple times with the same name parameter, do not depend on the method returning a reference to the same object with each call. This is because the GetObject method can return a reference to an existing resource object in a cache, or it can reload the resource and return a reference to a new resource object.

The following example uses the GetObject(String) method to deserialize a custom object. The example includes a source code file named UIElements.cs (UIElements.vb if you're using Visual Basic) that defines the following structure named PersonTable. This structure is intended to be used by a general table display routine that displays the localized names of table columns. Note that the PersonTable structure is marked with the SerializableAttribute attribute.

using System;

[Serializable] public struct PersonTable
{
   public readonly int nColumns;
   public readonly string column1; 
   public readonly string column2;
   public readonly string column3; 
   public readonly int width1;
   public readonly int width2;
   public readonly int width3;

   public PersonTable(string column1, string column2, string column3,
                  int width1, int width2, int width3)
   {
      this.column1 = column1;
      this.column2 = column2;
      this.column3 = column3;
      this.width1 = width1;
      this.width2 = width2;
      this.width3 = width3;
      this.nColumns = typeof(PersonTable).GetFields().Length / 2; 
   }
}

The following code from a file named CreateResources.cs (CreateResources.vb for Visual Basic) creates an XML resource file named UIResources.resx that stores a table title and a PersonTable object that contains information for an app that is localized for the English language.

using System;
using System.Resources;

public class CreateResource
{
   public static void Main()
   {
      PersonTable table = new PersonTable("Name", "Employee Number", 
                                          "Age", 30, 18, 5);
      ResXResourceWriter rr = new ResXResourceWriter(@".\UIResources.resx");
      rr.AddResource("TableName", "Employees of Acme Corporation");
      rr.AddResource("Employees", table);
      rr.Generate();
      rr.Close();
   }
}

The following code in a source code file named GetObject.cs (GetObject.vb) then retrieves the resources and displays them to the console.

using System;
using System.Resources;

[assembly: NeutralResourcesLanguageAttribute("en")]

public class Example
{
   public static void Main()
   {
      string fmtString = String.Empty;
      ResourceManager rm = new ResourceManager("UIResources", typeof(Example).Assembly);       
      string title = rm.GetString("TableName");
      PersonTable tableInfo = (PersonTable) rm.GetObject("Employees");

      if (! String.IsNullOrEmpty(title)) {
         fmtString = "{0," + ((Console.WindowWidth + title.Length) / 2).ToString() + "}"; 
         Console.WriteLine(fmtString, title);      
         Console.WriteLine();
      }

      for (int ctr = 1; ctr <= tableInfo.nColumns; ctr++) {
         string columnName = "column"  + ctr.ToString();
         string widthName = "width" + ctr.ToString();
         string value = tableInfo.GetType().GetField(columnName).GetValue(tableInfo).ToString();
         int width = (int) tableInfo.GetType().GetField(widthName).GetValue(tableInfo);
         fmtString = "{0,-" + width.ToString() + "}";
         Console.Write(fmtString, value);
      }      
      Console.WriteLine();
   }
}

You can build the necessary resource file and assemblies and run the app by executing the following batch file. You must use the /r option to supply Resgen.exe with a reference to UIElements.dll so that it can access information about the PersonTable structure. If you're using C#, replace the vbc compiler name with csc, and replace the .vb extension with .cs.

vbc /t:library UIElements.vb
vbc CreateResources.vb /r:UIElements.dll
CreateResources

resgen UIResources.resx  /r:UIElements.dll
vbc GetObject.vb /r:UIElements.dll /resource:UIResources.resources

GetObject.exe

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

Show:
© 2014 Microsoft