This patch adds an extension method to Paragraph that allows easy setting of paragraph. It makes setting text as a heading much more intuitive and discoverable.

Covers Heading 1 - Heading 9

Example available in examples under DocumentHeading() method.

DocX/DocX.csproj

     <Compile Include="Charts\XElementHelpers.cs" />
     <Compile Include="Container.cs" />
     <Compile Include="DocumentTypes.cs" />
+    <Compile Include="ExtensionsHeadings.cs" />
     <Compile Include="Footers.cs" />
     <Compile Include="Footer.cs" />
     <Compile Include="CustomProperty.cs" />

DocX/ExtensionsHeadings.cs

+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Xml.Linq;
+using Novacode;
+
+
+namespace Novacode
+{
+    public static class ExtensionsHeadings
+    {
+        public static Paragraph Heading(this Paragraph paragraph, HeadingType headingType)
+        {
+            string StyleName = headingType.EnumDescription();
+            paragraph.StyleName = StyleName;
+            return paragraph;
+        }
+
+        public static string EnumDescription(this Enum enumValue)
+        {
+            if (enumValue == null || enumValue.ToString() == "0")
+            {
+                return string.Empty;
+            }
+            FieldInfo enumInfo = enumValue.GetType().GetField(enumValue.ToString());
+            DescriptionAttribute[] enumAttributes = (DescriptionAttribute[])enumInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
+            if (enumAttributes.Length > 0)
+            {
+                return enumAttributes[0].Description;
+            }
+            else
+            {
+                return enumValue.ToString();
+            }
+        }
+    }
+    
+}

DocX/_Enumerations.cs

-namespace Novacode
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+
+
+namespace Novacode
 {
 
   public enum ListItemType
   	Auto,
   	None
   }
+  public enum HeadingType
+  {
+      [Description("Heading1")]
+      Heading1,
+
+      [Description("Heading2")]
+      Heading2,
+
+      [Description("Heading3")]
+      Heading3,
+
+      [Description("Heading4")]
+      Heading4,
+
+      [Description("Heading5")]
+      Heading5,
+
+      [Description("Heading6")]
+      Heading6,
+
+      [Description("Heading7")]
+      Heading7,
+
+      [Description("Heading8")]
+      Heading8,
+
+      [Description("Heading9")]
+      Heading9,
+
+
+      /*		 
+       * The Character Based Headings below do not work in the same way as the headings 1-9 above, but appear on the same list in word. 
+       * I have kept them here for reference in case somebody else things its just a matter of adding them in to gain extra headings
+       */
+      #region Other character (NOT paragraph) based Headings
+      //[Description("NoSpacing")]
+      //NoSpacing,
+
+      //[Description("Title")]
+      //Title,
+
+      //[Description("Subtitle")]
+      //Subtitle,
+
+      //[Description("Quote")]
+      //Quote,
+
+      //[Description("IntenseQuote")]
+      //IntenseQuote,
+
+      //[Description("Emphasis")]
+      //Emphasis,
+
+      //[Description("IntenseEmphasis")]
+      //IntenseEmphasis,
+
+      //[Description("Strong")]
+      //Strong,
+
+      //[Description("ListParagraph")]
+      //ListParagraph,
+
+      //[Description("SubtleReference")]
+      //SubtleReference,
+
+      //[Description("IntenseReference")]
+      //IntenseReference,
+
+      //[Description("BookTitle")]
+      //BookTitle, 
+      #endregion
+
+
+  }
+
 }

DocX/_Extensions.cs

 using System.Collections.Generic;
 using System.Linq;
 using System.Drawing;
+using System.ComponentModel;
+using System.IO;
+using System.Reflection;
+using System.Text;
 using System.Xml.Linq;
 
 namespace Novacode
             }
         }
     }
+
 }

Examples/Program.cs

 using System.Linq;
 using System.Threading.Tasks;
 using Novacode;
+using System.Collections.Generic;
+using System.Linq;
+using System.Drawing;
+using System.ComponentModel;
+using System.IO;
+using System.Reflection;
+using System.Text;
+using System.Xml.Linq;
 
 namespace Examples
 {
             HeadersAndFootersWithImagesAndTables();
             HeadersAndFootersWithImagesAndTablesUsingInsertPicture();
             DocumentsWithListsFontChange();
+            DocumentHeading();
 
             // Advanced
             Console.WriteLine("\nRunning Advanced Examples");
                 Console.WriteLine("\tCreated: docs\\Equations.docx\n");
             }
         }
+        public static void DocumentHeading()
+        {
+            Console.WriteLine("\nDocumentHeading()");
+            using (DocX document = DocX.Create(@"docs\DocumentHeading.docx"))
+            {
+
+                foreach (HeadingType heading in (HeadingType[])Enum.GetValues(typeof(HeadingType)))
+                {
+                    string text = string.Format("{0} - The quick brown fox jumps over the lazy dog", heading.EnumDescription());
+
+                    Paragraph p = document.InsertParagraph();
+                    p.AppendLine(text).Heading(heading);
+                }
+
 
+                document.Save();
+                Console.WriteLine("\tCreated: docs\\DocumentHeading.docx\n");
+            }
+        }
         private static void Bookmarks()
         {
             Console.WriteLine("\nBookmarks()");

UnitTests/DocXUnitTests.cs

       [TestMethod]
       public void Test_Paragraph_RemoveTextManyLetters()
       {
-          using (DocX document = DocX.Create(@"docs\HelloWorldRemovingManyLetters.docx"))
+          using (DocX document = DocX.Create(@"HelloWorldRemovingManyLetters.docx"))
           {
 
               Paragraph p3 = document.InsertParagraph("");
           Assert.IsFalse(deleted);
           Assert.AreEqual(0, row.Cells[0].Paragraphs.Count());
       }
+      [TestMethod]
+      public void GenerateHeadingTestDocument()
+      {
+          using (DocX document = DocX.Create(@"Document Header Test.docx"))
+          {
+
+              foreach (HeadingType heading in (HeadingType[])Enum.GetValues(typeof(HeadingType)))
+              {
+                  string text = string.Format("{0} - The quick brown fox jumps over the lazy dog", heading.EnumDescription());
+
+                  Paragraph p = document.InsertParagraph();
+                  p.AppendLine(text).Heading(heading);
+              }
+
+
+              document.Save();
+          }
+      }
 
 
     }