Fixed null reference exception that occurred if the WiX dialog designer was switched to when no WiX project was open.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@1660 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/AddIns/BackendBindings/WixBinding/Project/Src/Gui/NameValueListEditor.cs

@@ -120,7 +120,7 @@ namespace ICSharpCode.WixBinding
 			// 
 			// valueColumn
 			// 
-			this.valueColumn.HeaderText = "ValueColumn";
+			this.valueColumn.HeaderText = "Value";
 			this.valueColumn.Name = "valueColumn";
 			this.valueColumn.Width = 400;
 			// 

src/AddIns/BackendBindings/WixBinding/Project/Src/Gui/WixDialogDesigner.cs

@@ -289,9 +289,12 @@ namespace ICSharpCode.WixBinding
 		/// </summary>
 		WixProject GetProject()
 		{
-			foreach (IProject project in ProjectService.OpenSolution.Projects) {
-				if (project.IsFileInProject(base.viewContent.FileName)) {
-					return project as WixProject;
+			Solution openSolution = ProjectService.OpenSolution;
+			if (openSolution != null) {
+				foreach (IProject project in openSolution.Projects) {
+					if (project.IsFileInProject(base.viewContent.FileName)) {
+						return project as WixProject;
+					}
 				}
 			}
 			return null;

src/AddIns/BackendBindings/WixBinding/Project/Src/WixDocument.cs

@@ -419,7 +419,10 @@ namespace ICSharpCode.WixBinding
 		/// </summary>
 		public string GetValue(string name)
 		{
-			return project.GetVariable(name);
+			if (project != null) {
+				return project.GetVariable(name);
+			}
+			return null;
 		}
 		
 		/// <summary>

src/AddIns/BackendBindings/WixBinding/Test/Document/GetValueWithNoProjectTestFixture.cs

@@ -0,0 +1,24 @@
+// <file>
+//     <copyright see="prj:///doc/copyright.txt"/>
+//     <license see="prj:///doc/license.txt"/>
+//     <owner name="Matthew Ward" email="mrward@users.sourceforge.net"/>
+//     <version>$Revision$</version>
+// </file>
+
+using ICSharpCode.WixBinding;
+using NUnit.Framework;
+using System;
+
+namespace WixBinding.Tests.Document
+{
+	[TestFixture]
+	public class GetValueWithNoProjectTestFixture
+	{
+		[Test]
+		public void NullReturned()
+		{
+			WixDocument doc = new WixDocument();
+			Assert.IsNull(doc.GetValue("test"));
+		}
+	}
+}

src/AddIns/BackendBindings/WixBinding/Test/WixBinding.Tests.csproj

@@ -142,6 +142,7 @@
     <Compile Include="DialogXmlGeneration\ListViewItemAddedTestFixture.cs" />
     <Compile Include="DialogXmlGeneration\ListViewItemRemovedTestFixture.cs" />
     <Compile Include="DialogXmlGeneration\ListViewAddedTestFixture.cs" />
+    <Compile Include="Document\GetValueWithNoProjectTestFixture.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Project\WixBinding.csproj">