RadEditor for ASP.NET AJAX

You can save the RadEditor content in an external text or HTML file as well as load the content from an external file in the editor by following the instructions below:

1. Create an HTML file (test.html) in the root of your web application

2. Declare RadEditor and an Asp.NET button in your page:

   CopyASPX

   <telerik:radeditor runat="server" ID="RadEditor1" ></telerik:radeditor>
   <asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click"  />

3. To save the RadEditor content in the external HTML file when the Submit button is pressed, add the following code inside the button click eventhandler in the codebehind:

   • C#
   • VB.NET

   CopyC#

   protected string path = "test.html"; //specify the path to your file
   ...
   protected void Button1_Click1(object sender, EventArgs e)
   {
      //Open file for writing and write content
      using (StreamWriter externalFile = new StreamWriter(this.MapPath(path), false))
      {
          externalFile.Write(RadEditor1.Content);
      }
   }

   CopyVB.NET

       Protected path As String = "test.html"
   ...
       'specify the path to your file
       Protected Sub Button1_Click1(ByVal sender As Object, ByVal e As EventArgs)
           'Open file for writing and write content
           Using externalFile As New StreamWriter(Me.MapPath(path), False)
               externalFile.Write(RadEditor1.Content)
           End Using
       End Sub

4. To load the external file content in the RadEditor, read the file content with the ReadFile function and assign the returned string to the Html property of RadEditor in the Page_Load event:

   • C#
   • VB.NET

   CopyC#

   protected void Page_Load(object sender, EventArgs e)
   {
      if (!Page.IsPostBack)
      {
          RadEditor1.Content = ReadFile(Server.MapPath(path));
      }
   }
   
   protected string ReadFile(string path)
   {
      if (!System.IO.File.Exists(path))
      {
          return string.Empty;
      }
      using (System.IO.StreamReader sr = new System.IO.StreamReader(path))
      {
          return sr.ReadToEnd();
      }
   }

   CopyVB.NET

   Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
       If Not Page.IsPostBack Then
           RadEditor1.Content = ReadFile(Server.MapPath(path))
       End If
   End Sub
   
   Protected Function ReadFile(ByVal path As String) As String
       If Not System.IO.File.Exists(path) Then
           Return String.Empty
       End If
       Using sr As New System.IO.StreamReader(path)
           Return sr.ReadToEnd()
       End Using
   End Function