Add, Count, Retrieve and Remove Variables in a Word document Using C#

Document variables are used to preserve macro settings in between macro sessions. Spire.Doc allows adding variables, counting the number of variables, retrieving the name and value of variables, and removing specific variables in a Word document.

Add a Variable

Use the Add method to add a variable to a document. The following example adds a document variable named "A1" with a value of 12 to the document.

using Spire.Doc;
using Spire.Doc.Documents;
namespace ADDVARIABLE
{
    class Program
    {

        static void Main(string[] args)
        {
            //Instantiate a document object
            Document document = new Document();
            //Add a section
            Section section = document.AddSection();
            //Add a paragraph
            Paragraph paragraph = section.AddParagraph();
            //Add a DocVariable Filed
            paragraph.AppendField("A1", FieldType.FieldDocVariable);
            //Add a document variable to the DocVariable Filed
            document.Variables.Add("A1", "12");
            //Update fields
            document.IsUpdateFields = true;
            //Save and close the document object
            document.SaveToFile("AddVariable.docx", FileFormat.Docx2013);
            document.Close();
        }
    }
}

Count the number of Variables

Use the Count property to return the number of variables in a document.

//Load the document
Document document = new Document("AddVariable.docx");
//Get the number of variables in the document
int number = document.Variables.Count;

Console.WriteLine(number);

Add, Count, Retrieve and Remove Variables in a Word document Using C#

Retrieve Name and Value of a Variable

Use the GetNameByIndex and GetValueByIndex methods to retrieve the name and value of the variable by index, and the Variables[String Name] to retrieve or set the value of the variable by name.

using Spire.Doc;
using Spire.Doc.Documents;
using System;
namespace COUNTVARIABLE
{

    class Program
    {

        static void Main(string[] args)
        {
            //Load the document
            Document document = new Document("AddVariable.docx");
            //Get the number of variables in the document
            int number = document.Variables.Count;

            Console.WriteLine(number);

        }
    }
}

Add, Count, Retrieve and Remove Variables in a Word document Using C#

Remove a specific Variable

Use the Remove method to remove the variable from the document.

using Spire.Doc;
using System;
namespace RETRIEVEVARIABLE
{
    class Program
    {
        static void Main(string[] args)
        {
            //Load the document
            Document document = new Document("AddVariable.docx");

            // Retrieve name of the variable by index
            string s1 = document.Variables.GetNameByIndex(0);

            // Retrieve value of the variable by index
            string s2 = document.Variables.GetValueByIndex(0);

            // Retrieve or set value of the variable by name
            string s3 = document.Variables["A1"];

            Console.WriteLine("{0} {1} {2}", s1, s2, s3);
        }
    }
}

Add, Count, Retrieve and Remove Variables in a Word document Using C#

See Also