Add Named Value with Aspose.Page

Introduction

In the realm of document processing with .NET, Aspose.Page stands out as a powerful tool for handling EPS files. Aspose.Page empowers developers to manipulate XMP metadata, facilitating tasks such as adding named values. This tutorial will guide you through the process of adding named values to an EPS file using Aspose.Page in a step-by-step manner.

Prerequisites

Before diving into the tutorial, ensure that you have the following prerequisites in place:

• Basic knowledge of C# programming language.
• An integrated development environment (IDE) such as Visual Studio installed.
• Aspose.Page for .NET library. If not installed, you can download it from here.

Import Namespaces

Firstly, let’s import the necessary namespaces into your C# code. These namespaces are vital for accessing the functionalities provided by Aspose.Page:

using Aspose.Page.EPS;
using Aspose.Page.EPS.Device;
using Aspose.Page.EPS.XMP;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

Step 1: Initialize EPS File Input Stream

The initial step involves initializing the input stream for the EPS file. Replace "Your Document Directory" with the path to your document directory:

// ExStart:1
string dataDir = "Your Document Directory";
System.IO.FileStream psStream = new System.IO.FileStream(dataDir + "add_named_value_input.eps", System.IO.FileMode.Open, System.IO.FileAccess.Read);
PsDocument document = new PsDocument(psStream);

Step 2: Get XMP Metadata

Retrieve XMP metadata from the EPS file. If the EPS file lacks XMP metadata, a new one will be created, filled with values from PS metadata comments:

XmpMetadata xmp = document.GetXmpMetadata();

Step 3: Change XMP Metadata Values

Now, let’s make changes to the XMP metadata. In this example, we’ll add a named value to the “xmpTPg:MaxPageSize” structure:

xmp.AddNamedValue("xmpTPg:MaxPageSize", "stDim:newKey", new XmpValue("NewValue"));

Step 4: Save EPS File with Changed XMP Metadata

Save the EPS file with the updated XMP metadata. Create an output stream and save the modified EPS file:

using (System.IO.FileStream outPsStream = new System.IO.FileStream(dataDir + "add_named_value_output.eps", System.IO.FileMode.Create, System.IO.FileAccess.Write))
{
    document.Save(outPsStream);
}

Conclusion

Congratulations! You’ve successfully added a named value to an EPS file using Aspose.Page in .NET. This tutorial has walked you through the essential steps, showcasing the simplicity and effectiveness of Aspose.Page in document manipulation.

FAQ’s

Q1: Is Aspose.Page compatible with different EPS file versions?

A1: Aspose.Page supports various EPS file versions, ensuring compatibility with a wide range of documents.

Q2: Can I use Aspose.Page for commercial projects?

A2: Yes, Aspose.Page comes with a commercial license, and you can purchase it here.

Q3: Is there a free trial available for Aspose.Page?

A3: Yes, you can explore Aspose.Page with a free trial available here.

Q4: How can I get support or connect with the Aspose community?

A4: Visit the Aspose.Page forum to get support and connect with the community.

Q5: What is a temporary license, and how can I obtain one?

A5: If you need a temporary license for testing or evaluation purposes, you can acquire one here.