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2 | 2 | title: Create Stream Provider in .NET with Aspose.HTML |
3 | 3 | linktitle: Create Stream Provider in .NET with Aspose.HTML |
4 | 4 | second_title: Aspose.Slides .NET HTML manipulation API |
5 | | -description: |
| 5 | +description: Learn how to use Aspose.HTML for .NET to manipulate HTML documents efficiently. Step-by-step tutorial for developers. |
6 | 6 | type: docs |
7 | 7 | weight: 11 |
8 | 8 | url: /net/advanced-features/create-stream-provider-dotnet-aspose-html/ |
9 | 9 | --- |
| 10 | +In the world of web development and document manipulation, Aspose.HTML for .NET stands as a powerful tool. This tutorial will guide you through the process of using Aspose.HTML for .NET, breaking down each step, and explaining its importance. Whether you're a seasoned developer or just starting, this guide will help you harness the capabilities of Aspose.HTML for .NET effectively. |
| 11 | + |
| 12 | +## Introduction |
| 13 | + |
| 14 | +Aspose.HTML for .NET is a versatile library that empowers .NET developers to work with HTML documents effortlessly. With its wide range of functionalities, it enables you to create, manipulate, and convert HTML files, making it a valuable asset in various applications, including web development and document management. |
| 15 | + |
| 16 | +## Prerequisites |
| 17 | + |
| 18 | +Before diving into the tutorial, ensure you have the following prerequisites in place: |
| 19 | + |
| 20 | +1. Visual Studio: To begin with Aspose.HTML for .NET, you'll need Visual Studio installed on your machine. You can download it [here](https://visualstudio.microsoft.com/). |
| 21 | + |
| 22 | +2. Aspose.HTML for .NET Library: Download and install the Aspose.HTML for .NET library. You can get it from [here](https://releases.aspose.com/html/net/). |
| 23 | + |
| 24 | +3. Basic C# Knowledge: A fundamental understanding of C# programming will be beneficial for following the code examples. |
| 25 | + |
| 26 | +Now that you have the prerequisites ready, let's delve into the core of this tutorial. |
| 27 | + |
| 28 | +## Importing Namespaces |
| 29 | + |
| 30 | +In C#, namespaces are essential to organize and access libraries. To work with Aspose.HTML for .NET, you need to import the necessary namespaces at the beginning of your code. Here's how you do it: |
| 31 | + |
| 32 | +```csharp |
| 33 | +using Aspose.Html; |
| 34 | +using Aspose.Html.Converters; |
| 35 | +using Aspose.Html.Saving; |
| 36 | +using Aspose.Html.StreamProviders; |
| 37 | +using System; |
| 38 | +using System.Collections.Generic; |
| 39 | +using System.IO; |
| 40 | +``` |
| 41 | + |
| 42 | +These namespaces provide you with the classes and methods required for HTML document manipulation. |
| 43 | + |
| 44 | +## Breaking Down the Example |
| 45 | + |
| 46 | +Now, let's break down the provided code example into multiple steps and explain each step in detail. |
| 47 | + |
| 48 | +### Step 1: Set the Data Directory |
| 49 | + |
| 50 | +```csharp |
| 51 | +string dataDir = "Your Data Directory"; |
| 52 | +``` |
| 53 | + |
| 54 | +In this step, you define a variable `dataDir` to specify the directory where your output file will be saved. Make sure to replace `"Your Data Directory"` with the actual path to your desired directory. |
| 55 | + |
| 56 | +### Step 2: Create a Custom StreamProvider |
| 57 | + |
| 58 | +```csharp |
| 59 | +using (MemoryStreamProvider streamProvider = new MemoryStreamProvider()) |
| 60 | +{ |
| 61 | + // Code for document manipulation goes here |
| 62 | +} |
| 63 | +``` |
| 64 | + |
| 65 | +Here, you create a custom `MemoryStreamProvider` to manage memory streams that will hold the result data. This step is crucial for handling the output of the HTML conversion. |
| 66 | + |
| 67 | +### Step 3: Create an HTML Document |
| 68 | + |
| 69 | +```csharp |
| 70 | +using (HTMLDocument document = new HTMLDocument()) |
| 71 | +{ |
| 72 | + // Code for HTML document manipulation goes here |
| 73 | +} |
| 74 | +``` |
| 75 | + |
| 76 | +Within this step, you initiate an HTML document using `HTMLDocument`. This document will be the basis for your HTML manipulation. |
| 77 | + |
| 78 | +### Step 4: Add Content to the HTML Document |
| 79 | + |
| 80 | +```csharp |
| 81 | +document.Body.AppendChild(document.CreateTextNode("Hello world!!!")); |
| 82 | +``` |
| 83 | + |
| 84 | +This line adds a simple "Hello world!!!" text to the HTML document. You can modify this content according to your requirements. |
| 85 | + |
| 86 | +### Step 5: Convert HTML to XPS |
10 | 87 |
|
11 | | -## Complete Source Code |
12 | 88 | ```csharp |
13 | | - public static void Run() |
14 | | - { |
15 | | - // ExStart:1 |
16 | | - // The path to the documents directory |
17 | | - string dataDir = "Your Data Directory"; |
18 | | - // Create a custom StreamProvider based on ICreateStreamProvider interface |
19 | | - using (MemoryStreamProvider streamProvider = new MemoryStreamProvider()) |
20 | | - { |
21 | | - // Create a simple HTML document |
22 | | - using (HTMLDocument document = new HTMLDocument()) |
23 | | - { |
24 | | - // Add your first 'hello world' to the document. |
25 | | - document.Body.AppendChild(document.CreateTextNode("Hello world!!!")); |
26 | | - // Convert HTML document to XPS by using the custom StreamProvider |
27 | | - Aspose.Html.Converters.Converter.ConvertHTML(document, new XpsSaveOptions(), streamProvider); |
28 | | - // Get access to the memory stream that contains the result data |
29 | | - var memory = streamProvider.Streams[0]; |
30 | | - memory.Seek(0, SeekOrigin.Begin); |
31 | | - // Flush the result data to the output file |
32 | | - using (FileStream fs = File.Create(dataDir + "output.xps")) |
33 | | - { |
34 | | - memory.CopyTo(fs); |
35 | | - } |
36 | | - } |
37 | | - } |
38 | | - // ExEnd:1 |
39 | | - } |
40 | | - } |
41 | | - public class MemoryStreamProvider : ICreateStreamProvider |
42 | | - { |
43 | | - // List of MemoryStream objects created during the document rendering |
44 | | - public List<MemoryStream> Streams { get; } = new List<MemoryStream>(); |
45 | | - public Stream GetStream(string name, string extension) |
46 | | - { |
47 | | - // This method is called when the only one output stream is required, for instance for XPS, PDF or TIFF formats |
48 | | - MemoryStream result = new MemoryStream(); |
49 | | - Streams.Add(result); |
50 | | - return result; |
51 | | - } |
52 | | - public Stream GetStream(string name, string extension, int page) |
53 | | - { |
54 | | - // This method is called when the creation of multiple output streams are required. For instance during the rendering HTML to list of the image files (JPG, PNG, etc.) |
55 | | - MemoryStream result = new MemoryStream(); |
56 | | - Streams.Add(result); |
57 | | - return result; |
58 | | - } |
59 | | - public void ReleaseStream(Stream stream) |
60 | | - { |
61 | | - // Here You can release the stream filled with data and, for instance, flush it to the hard-drive |
62 | | - } |
63 | | - public void Dispose() |
64 | | - { |
65 | | - // Releasing resources |
66 | | - foreach (var stream in Streams) |
67 | | - stream.Dispose(); |
68 | | - } |
| 89 | +Aspose.Html.Converters.Converter.ConvertHTML(document, new XpsSaveOptions(), streamProvider); |
69 | 90 | ``` |
| 91 | + |
| 92 | +Here, you use the `Converter` class to convert the HTML document to XPS format. The `XpsSaveOptions()` provides settings for the conversion, and `streamProvider` manages the output. |
| 93 | + |
| 94 | +### Step 6: Save the Output |
| 95 | + |
| 96 | +```csharp |
| 97 | +var memory = streamProvider.Streams[0]; |
| 98 | +memory.Seek(0, SeekOrigin.Begin); |
| 99 | + |
| 100 | +using (FileStream fs = File.Create(dataDir + "output.xps")) |
| 101 | +{ |
| 102 | + memory.CopyTo(fs); |
| 103 | +} |
| 104 | +``` |
| 105 | + |
| 106 | +In this step, you retrieve the converted XPS data from the memory stream and save it to an output file named "output.xps" in the specified data directory. |
| 107 | + |
| 108 | +## Conclusion |
| 109 | + |
| 110 | +In this tutorial, we've covered the fundamentals of using Aspose.HTML for .NET. We started by setting up the prerequisites, importing the necessary namespaces, and then broke down a code example into multiple steps to convert an HTML document to XPS format. |
| 111 | + |
| 112 | +Aspose.HTML for .NET offers a wide range of capabilities beyond what we've explored here. To further enhance your skills, refer to the [official documentation](https://reference.aspose.com/html/net/) and explore more advanced features and use cases. |
| 113 | + |
| 114 | +## FAQ's |
| 115 | + |
| 116 | +### Q1. What is Aspose.HTML for .NET? |
| 117 | + |
| 118 | +A1: Aspose.HTML for .NET is a powerful library that allows .NET developers to work with HTML documents, including creation, manipulation, and conversion to various formats. |
| 119 | + |
| 120 | +### Q2. Where can I download Aspose.HTML for .NET? |
| 121 | + |
| 122 | +A2: You can download the library from [this link](https://releases.aspose.com/html/net/). |
| 123 | + |
| 124 | +### Q3. Is there a free trial available? |
| 125 | + |
| 126 | +A3: Yes, you can access a free trial of Aspose.HTML for .NET [here](https://releases.aspose.com/). |
| 127 | + |
| 128 | +### Q4. How can I get temporary licenses? |
| 129 | + |
| 130 | +A4: Temporary licenses can be obtained from [here](https://purchase.aspose.com/temporary-license/). |
| 131 | + |
| 132 | +### Q5. Where can I seek help or discuss issues related to Aspose.HTML for .NET? |
| 133 | + |
| 134 | +A5: You can visit the official Aspose forums for support and discussions at [this link](https://forum.aspose.com/). |
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