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Images

Functionality:

Using the Image Manager dialog the users of RadEditor can:

  • insert images in the editor's content area

  • upload new images, which will be available for inserting.

  • delete images

Properties to set:

The behavior of the Image Manager dialog is controlled by the following properties:

note

Starting from Q1 2012, the Image Manager has a new default thumbnail mode, which shows the files as icons in the central area of the dialog. The old grid mode can be restored by setting the ViewMode property to "Grid".

Property Description
ViewMode Gets or sets the ExplorerMode of the FileExplorer that handles the file browsing of the ImageManager. Default is Thumbnail.
ViewPaths A string array which contains the paths where the RadEditor will look for images. The default value is an empty array. These folders will be visible in the file browser part of the dialog.
UploadPaths A string array which contains the paths to which the RadEditor will be able to upload images. The default value is an empty string array. The elements of this array must be a subset of the ViewPaths array.
DeletePaths A string array which contains the paths from which the RadEditor will be able to delete images. The default value is an empty string array. The elements of this array must be a subset of the ViewPaths array.
MaxUploadFileSize The maximum image file size in bytes, allowed for uploading. The default value is 204800 bytes (200 kilobytes).
SearchPatterns A string array which contains the file extension filters that controls which files are shown in the Image Manager dialog and which file types can be uploaded through the upload dialog.The * character can be used as a wildcard in the file name, for example .jpg will match all image names with extension jpg.

In order for a folder to be visible in the file browser, it must be present in the ViewPaths array. The users will be able to browse its subfolders since they inherit the permissions. If it is needed to grant permission for deleting or uploading images into a specific folder, it must be present in the corresponding array - DeletePaths or UploadPaths. These permissions are also inherited by the subfolders.The application root folder can be substituted with the "~" (tilde) character. It is possible to use paths relative to the root. For example, in order to access images located in another web application.

Example 1 and Example 2 demonstrate the relationship between the folder structure and the property settings:

With the settings above, the users will be able to browse all subfolders of the "~/images" folder. They will be able to upload images to the "~/Images/New" folder and all its subfolders and delete images from "~/Images/New/Articles" and "~/Images/New/News".

Example 1: Setting Image manager properties inline.

<telerik:RadEditor RenderMode="Lightweight" runat="server" ID="RadEditor1">
    <ImageManager ViewPaths="~/Images" UploadPaths="~/Images/New" DeletePaths="~/Images/New/Articles,~/Images/New/News" />
</telerik:RadEditor>

Example 2: Setting Image manager properties in CodeBehind.


string[] viewImages = new string[] { "~/Images" };
string[] uploadImages = new string[] { "~/Images/New" };
string[] deleteImages = new string[] { "~/Images/New/Articles", "~/Images/New/News" };

if (!IsPostBack)
{
    RadEditor1.ImageManager.ViewPaths = viewImages;
    RadEditor1.ImageManager.UploadPaths = uploadImages;
    RadEditor1.ImageManager.DeletePaths = deleteImages;
    //to change the View mode to Grid use the below syntax
    RadEditor1.ImageManager.ViewMode = Telerik.Web.UI.Editor.DialogControls.ImageManagerViewMode.Grid;
} 

Dim viewImages As String() = New String() {"~/Images"}
Dim uploadImages As String() = New String() {"~/Images/New"}
Dim deleteImages As String() = New String() {"~/Images/New/Articles", "~/Images/New/News"}

If Not IsPostBack Then
    RadEditor1.ImageManager.ViewPaths = viewImages
    RadEditor1.ImageManager.UploadPaths = uploadImages
    RadEditor1.ImageManager.DeletePaths = deleteImages
    'to change the View mode to Grid use the below syntax
    RadEditor1.ImageManager.ViewMode = Telerik.Web.UI.Editor.DialogControls.ImageManagerViewMode.Grid
End If

Note that the viewImages, uploadImages and deleteImages variables are string arrays and that the Images folders must be:

  • a subdirectory of your web application

  • directory placed in the root of IIS - you can set this folder by using the / forward slash symbol, e.g. RadEditor1.ImageManager.ViewPaths = new String []{"/Images"};

  • a virtual directory of your web application that has a physical path pointing outside of your web application.

note

You should also grant full ASP.NET account permissions over the Images Folders on Win XP computers with IIS 5.1. On Win 2003 servers with IIS 6.0 you should grant full NETWORK SERVICE account permissions over the Images Folder.

note

The Images inserted via the ImageManager have relative paths . In scenarios when absolute paths are needed enable the MakeUrlsAbsolute client-side filter of RadEditor:

  • via the codebehind: RadEditor1.EnableFilter(EditorFilters. MakeUrlsAbsolute );
  • inline: <telerik:RadEditor RenderMode="Lightweight" ID="RadEditor1" ContentFilters="MakeUrlsAbsolute" runat="server" />

The Image manager offers a new feature named Image Editor, which provides the ability to resize, flip, rotate, crop, rename the selected image element as well as set its opacity:

Image Editor

See Also