Password

With TX Text Control, you can protect documents from authoring by encrypting the document with a password and adding editable areas as exceptions for specific users. The next code snippet adds an editable region in a specific selection range for the user developer@textcontrol.com . The word Text is now editable for this specific user:

textControl1.Text = "TX Text Control"; EditableRegion region = new EditableRegion("developer@textcontrol.com", 10, 4, 4); textControl1.EditableRegions.Add(region); Protecting Documents

The following code can be used to protect and save the document:

textControl1.EditMode = EditMode.UsePassword | EditMode.ReadAndSelect; textControl1.Save("encrypted-document.tx", TXTextControl.StreamType.InternalUnicodeFormat); After loading the document, the &#9584; TX Text Control .NET Server &#9584; Web Namespace &#9584; TextControl Class &#9584; UserNames Property Gets or sets a list of names specifying users who have access to editable regions. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>User Names property can be used to define a list of names that specify users who have access to editable areas. In this example, we grant access to the user developer@textcontrol.com :

@Html.TXTextControl().TextControl(settings => { settings.UserNames = new string[] { "developer@textcontrol.com" }; }).LoadText(sDocument, TXTextControl.Web.BinaryStreamType.InternalUnicodeFormat).Render() Loading Secured Documents

But what if you want to load a secured document into a non-visual &#9584; TX Text Control .NET Server &#9584; TXTextControl Namespace &#9584; ServerTextControl Class The ServerTextControl class implements a component that provide high-level text processing features for server-based applications. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Server Text Control and export the document to PDF?

Because the loaded document is protected and cannot be exported to PDF as is, the following code would fail:

using TXTextControl;

using (ServerTextControl tx = new ServerTextControl()) { tx.Create();

// Load an encrypted document protected with a password tx.Load("encrypted-document.tx", StreamType.InternalUnicodeFormat);

tx.Save("results.pdf", StreamType.AdobePDF); } Unlocking Secured Documents

There are two ways to solve this problem. The first way is to provide the password when loading the document to unlock it. This is done using the &#9584; TX Text Control .NET Server &#9584; TXTextControl Namespace &#9584; LoadSaveSettingsBase Class &#9584; MasterPassword Property Specifies a password for the document&#039;s access permissions. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Master Password property passed in the &#9584; TX Text Control .NET Server &#9584; TXTextControl Namespace &#9584; ServerTextControl Class &#9584; Load Method Loads text in a certain format. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Load method.

using TXTextControl;

using (ServerTextControl tx = new ServerTextControl()) { tx.Create();

LoadSettings loadSettings = new LoadSettings() { MasterPassword = "123" };

// Load an encrypted document protected with a password tx.Load("encrypted-document.tx", StreamType.InternalUnicodeFormat, loadSettings); tx.Save("results.pdf", StreamType.AdobePDF); } Preserving Original Settings

However, if you want to preserve the original author's &#9584; TX Text Control .NET Server &#9584; TXTextControl Namespace &#9584; SaveSettings Class &#9584; DocumentAccessPermissions Property Specifies how a document can be accessed after it has been opened. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Document Access Permissions , you can set the password when saving the PDF. The following code shows an advanced logic that uses the &#9584; TX Text Control .NET Server &#9584; TXTextControl Namespace &#9584; FilterException Class The FilterException class informs about errors which can occur when a text filter is used to convert a document to or from another format. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Filter Exceptions when saving the document. If the document contains an encrypted password, an exception is thrown and the &#9584; TX Text Control .NET Server &#9584; TXTextControl Namespace &#9584; LoadSaveSettingsBase Class &#9584; MasterPassword Property Specifies a password for the document&#039;s access permissions. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Master Password are used to pass the password to the &#9584; TX Text Control .NET Server &#9584; TXTextControl Namespace &#9584; ServerTextControl Class &#9584; Save Method Saves the complete contents of a document with the specified format. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Save method.

using TXTextControl;

using (ServerTextControl tx = new ServerTextControl()) { tx.Create();

// Load an encrypted document protected with a password tx.Load("encrypted-document.tx", StreamType.InternalUnicodeFormat);

// Trying to save the document as PDF try { tx.Save("results.pdf", StreamType.AdobePDF); } catch (FilterException exc) { // Check if the exception was thrown because of an encrypted password if (exc.Reason == FilterException.FilterError.EncryptedPassword) { // Provide the password to save the document SaveSettings saveSettings = new SaveSettings() { MasterPassword = "123" };

// Save the document as PDF tx.Save("results.pdf", StreamType.AdobePDF, saveSettings); } } } Conclusion

With TX Text Control, you can protect documents from editing by encrypting the document with a password and adding editable areas as exceptions for certain users. This article shows how to protect documents and how to unlock protected documents for further processing and export to PDF.

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