Important Update
The sample shows steps and algorithm of how to add watermark image from stream and how to make it work in your ASP.NET application. What is ByteScout Watermarking SDK? It is the powerful SDK can apply high quality visible and semivisible watermarks into PNG, JPG, BMP pictures and TIFF scans. Doznes of presets are available, multiple watermarks can be applied. Can add logo based watermark from image, can adjust font size, font family, colors. It can help you to add watermark image from stream in your ASP.NET application.
Fast application programming interfaces of ByteScout Watermarking SDK for ASP.NET plus the instruction and the code below will help you quickly learn how to add watermark image from stream. In order to implement the functionality, you should copy and paste this code for ASP.NET below into your code editor with your app, compile and run your application. Detailed tutorials and documentation are available along with installed ByteScout Watermarking SDK if you’d like to dive deeper into the topic and the details of the API.
Free trial version of ByteScout Watermarking SDK is available on our website. Documentation and source code samples are included.
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<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeBehind="Default.aspx.cs" Inherits="HelloWorld._Default" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<h2>
Welcome to ASP.NET!
</h2>
<p>
To learn more about ASP.NET visit <a href="http://www.asp.net" title="ASP.NET Website">www.asp.net</a>.
</p>
<p>
You can also find <a href="http://go.microsoft.com/fwlink/?LinkID=152368&clcid=0x409"
title="MSDN ASP.NET Docs">documentation on ASP.NET at MSDN</a>.
</p>
</asp:Content>
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using System;
using System.Drawing;
using System.IO;
using System.Web.UI;
using Bytescout.Watermarking;
using Bytescout.Watermarking.Presets;
namespace HelloWorld
{
public partial class _Default : Page
{
/*
IF YOU SEE TEMPORARY FOLDER ACCESS ERRORS:
Temporary folder access is required for web application when you use ByteScout SDK in it.
If you are getting errors related to the access to temporary folder like "Access to the path 'C:\Windows\TEMP\... is denied" then you need to add permission for this temporary folder to make ByteScout SDK working on that machine and IIS configuration because ByteScout SDK requires access to temp folder to cache some of its data for more efficient work.
SOLUTION:
If your IIS Application Pool has "Load User Profile" option enabled the IIS provides access to user's temp folder. Check user's temporary folder
If you are running Web Application under an impersonated account or IIS_IUSRS group, IIS may redirect all requests into separate temp folder like "c:\temp\".
In this case
- check the User or User Group your web application is running under
- then add permissions for this User or User Group to read and write into that temp folder (c:\temp or c:\windows\temp\ folder)
- restart your web application and try again
*/
protected void Page_Load(object sender, EventArgs e)
{
// Create Watermarker instance
Watermarker waterMarker = new Watermarker();
// Initialize library
waterMarker.InitLibrary("demo", "demo");
// Set input file name
string inputFilePath = MapPath("my_sample_image.jpg");
// Create sample input stream
Stream inputStream = new FileStream(inputFilePath, FileMode.Open);
// Create image from stream
Image image = new Bitmap(inputStream);
// Add image to apply watermarks to
waterMarker.AddInputFile(image);
// Create watermark
TextFitsPage preset = new TextFitsPage();
preset.Text = "Bytescout Watermarking";
preset.TextColor = Color.Aqua;
preset.Transparency = 25;
// Add watermark to Watermarker
waterMarker.AddWatermark(preset);
// Clear http output
Response.Clear();
// Set the content type to JPEG
Response.ContentType = "image/jpeg";
// Add content type header
Response.AddHeader("Content-Type", "image/jpeg");
// Set the content disposition
Response.AddHeader("Content-Disposition", "inline;filename=my_sample_image.jpg");
// Set Response.OutputStream as result image destination
waterMarker.OutputOptions.OutputStream = Response.OutputStream;
// Execute watermarking
waterMarker.Execute(0);
// Cleanup
image.Dispose();
inputStream.Dispose();
Response.End();
}
}
}
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//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace HelloWorld
{
public partial class _Default
{
}
}
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;
namespace HelloWorld
{
public class Global : System.Web.HttpApplication
{
void Application_Start(object sender, EventArgs e)
{
// Code that runs on application startup
}
void Application_End(object sender, EventArgs e)
{
// Code that runs on application shutdown
}
void Application_Error(object sender, EventArgs e)
{
// Code that runs when an unhandled error occurs
}
void Session_Start(object sender, EventArgs e)
{
// Code that runs when a new session is started
}
void Session_End(object sender, EventArgs e)
{
// Code that runs when a session ends.
// Note: The Session_End event is raised only when the sessionstate mode
// is set to InProc in the Web.config file. If session mode is set to StateServer
// or SQLServer, the event is not raised.
}
}
}
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace HelloWorld
{
public partial class SiteMaster : System.Web.UI.MasterPage
{
protected void Page_Load(object sender, EventArgs e)
{
}
}
}
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//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
namespace HelloWorld
{
public partial class SiteMaster
{
/// <summary>
/// HeadContent control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.WebControls.ContentPlaceHolder HeadContent;
/// <summary>
/// MasterPageScriptManager control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.ScriptManager MasterPageScriptManager;
/// <summary>
/// HeadLoginView control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.WebControls.LoginView HeadLoginView;
/// <summary>
/// HeadHomeLink control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.HtmlControls.HtmlAnchor HeadHomeLink;
/// <summary>
/// HeadAboutLink control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.HtmlControls.HtmlAnchor HeadAboutLink;
/// <summary>
/// MainContent control.
/// </summary>
/// <remarks>
/// Auto-generated field.
/// To modify move field declaration from designer file to code-behind file.
/// </remarks>
protected global::System.Web.UI.WebControls.ContentPlaceHolder MainContent;
}
}
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<?xml version="1.0"?>
<!-- For more information on using web.config transformation visit http://go.microsoft.com/fwlink/?LinkId=125889 -->
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<!--
In the example below, the "SetAttributes" transform will change the value of
"connectionString" to use "ReleaseSQLServer" only when the "Match" locator
finds an atrribute "name" that has a value of "MyDB".
<connectionStrings>
<add name="MyDB"
connectionString="Data Source=ReleaseSQLServer;Initial Catalog=MyReleaseDB;Integrated Security=True"
xdt:Transform="SetAttributes" xdt:Locator="Match(name)"/>
</connectionStrings>
-->
<system.web>
<!--
In the example below, the "Replace" transform will replace the entire
<customErrors> section of your web.config file.
Note that because there is only one customErrors section under the
<system.web> node, there is no need to use the "xdt:Locator" attribute.
<customErrors defaultRedirect="GenericError.htm"
mode="RemoteOnly" xdt:Transform="Replace">
<error statusCode="500" redirect="InternalError.htm"/>
</customErrors>
-->
</system.web>
</configuration>
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<?xml version="1.0"?>
<!-- For more information on using web.config transformation visit http://go.microsoft.com/fwlink/?LinkId=125889 -->
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<!--
In the example below, the "SetAttributes" transform will change the value of
"connectionString" to use "ReleaseSQLServer" only when the "Match" locator
finds an atrribute "name" that has a value of "MyDB".
<connectionStrings>
<add name="MyDB"
connectionString="Data Source=ReleaseSQLServer;Initial Catalog=MyReleaseDB;Integrated Security=True"
xdt:Transform="SetAttributes" xdt:Locator="Match(name)"/>
</connectionStrings>
-->
<system.web>
<compilation xdt:Transform="RemoveAttributes(debug)" />
<!--
In the example below, the "Replace" transform will replace the entire
<customErrors> section of your web.config file.
Note that because there is only one customErrors section under the
<system.web> node, there is no need to use the "xdt:Locator" attribute.
<customErrors defaultRedirect="GenericError.htm"
mode="RemoteOnly" xdt:Transform="Replace">
<error statusCode="500" redirect="InternalError.htm"/>
</customErrors>
-->
</system.web>
</configuration>
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<?xml version="1.0"?>
<!--
For more information on how to configure your ASP.NET application, please visit
http://go.microsoft.com/fwlink/?LinkId=169433
-->
<configuration>
<connectionStrings>
<add name="ApplicationServices"
connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true"
providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<compilation debug="true" targetFramework="4.0" />
<authentication mode="Forms">
<forms loginUrl="~/Account/Login.aspx" timeout="2880" />
</authentication>
<membership>
<providers>
<clear/>
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices"
enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false"
maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10"
applicationName="/" />
</providers>
</membership>
<profile>
<providers>
<clear/>
<add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>
</providers>
</profile>
<roleManager enabled="false">
<providers>
<clear/>
<add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />
<add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />
</providers>
</roleManager>
</system.web>
<system.webServer>
<modules runAllManagedModulesForAllRequests="true"/>
</system.webServer>
</configuration>
60 Day Free Trial or Visit ByteScout Watermarking SDK Home Page
Explore ByteScout Watermarking SDK Documentation
Explore Samples
Sign Up for ByteScout Watermarking SDK Online Training
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Explore Web API Docs
Explore Web API Samples
60 Day Free Trial or Visit ByteScout Watermarking SDK Home Page
Explore ByteScout Watermarking SDK Documentation
Explore Samples
Sign Up for ByteScout Watermarking SDK Online Training
Get Your API Key
Explore Web API Docs
Explore Web API Samples