ByteScout Spreadsheet SDK - ASP.NET VB.NET - Display XLS as HTML - ByteScout

ByteScout Spreadsheet SDK – ASP.NET VB.NET – Display XLS as HTML

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How to display XLS as HTML in ASP.NET VB.NET using ByteScout Spreadsheet SDK

How to code in ASP.NET VB.NET to display XLS as HTML with this step-by-step tutorial

This sample source code below will demonstrate you how to display XLS as HTML in ASP.NET VB.NET. ByteScout Spreadsheet SDK: the library (SDK) that is capable of writing, reading, modifying and calculating Excel and CSV spreadsheets. Most popular formulas can be calculated and reculculated with Excel installed. You may import or export data to and from CSV, XML, JSON as well as to and from databases, arrays. It can display XLS as HTML in ASP.NET VB.NET.

ASP.NET VB.NET code samples for ASP.NET VB.NET developers help to speed up coding of your application when using ByteScout Spreadsheet SDK. In your ASP.NET VB.NET project or application you may simply copy & paste the code and then run your app! Further enhancement of the code will make it more vigorous.

Trial version of ByteScout Spreadsheet SDK can be downloaded for free from our website. It also includes source code samples for ASP.NET VB.NET and other programming languages.

Try ByteScout Spreadsheet SDK today:  60 Day Free Trial (on-premise) or  Web API (on-demand version)

Default.aspx
      
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="DisplayXlsAsHtml._Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <div> <asp:Label ID="Label1" runat="server" Width="311px"></asp:Label><br /> <br /> <asp:Label ID="Label2" runat="server" Text="Select worksheet to display: "></asp:Label> <asp:DropDownList ID="DropDownList1" runat="server" Width="233px"> </asp:DropDownList> <asp:Button ID="ButtonGo" runat="server" Text="Go" Width="45px" OnClick="ButtonGo_Click" /></div> </form> </body> </html>

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Default.aspx.designer.vb
      
'------------------------------------------------------------------------------ ' <auto-generated> ' This code was generated by a tool. ' Runtime Version:2.0.50727.4927 ' ' Changes to this file may cause incorrect behavior and will be lost if ' the code is regenerated. ' </auto-generated> '------------------------------------------------------------------------------ ''' <summary> ''' _Default class. ''' </summary> ''' <remarks> ''' Auto-generated class. ''' </remarks> Public Partial Class _Default ''' <summary> ''' form1 control. ''' </summary> ''' <remarks> ''' Auto-generated field. ''' To modify move field declaration from designer file to code-behind file. ''' </remarks> Protected form1 As Global.System.Web.UI.HtmlControls.HtmlForm ''' <summary> ''' Label1 control. ''' </summary> ''' <remarks> ''' Auto-generated field. ''' To modify move field declaration from designer file to code-behind file. ''' </remarks> Protected Label1 As Global.System.Web.UI.WebControls.Label ''' <summary> ''' Label2 control. ''' </summary> ''' <remarks> ''' Auto-generated field. ''' To modify move field declaration from designer file to code-behind file. ''' </remarks> Protected Label2 As Global.System.Web.UI.WebControls.Label ''' <summary> ''' DropDownList1 control. ''' </summary> ''' <remarks> ''' Auto-generated field. ''' To modify move field declaration from designer file to code-behind file. ''' </remarks> Protected DropDownList1 As Global.System.Web.UI.WebControls.DropDownList ''' <summary> ''' ButtonGo control. ''' </summary> ''' <remarks> ''' Auto-generated field. ''' To modify move field declaration from designer file to code-behind file. ''' </remarks> Protected ButtonGo As Global.System.Web.UI.WebControls.Button End Class

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Default.aspx.vb
      
Imports Bytescout.Spreadsheet Public Partial Class _Default Inherits System.Web.UI.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 Private _document As Spreadsheet = Nothing Protected Sub Page_Load(sender As Object, e As EventArgs) Dim inputXlsFile As String = Server.MapPath("example.xls") ' Open spreadsheet _document = New Spreadsheet() _document.LoadFromFile(inputXlsFile) Label1.Text = """Example.xls"" loaded" For i As Integer = 0 To _document.Worksheets.Count - 1 DropDownList1.Items.Add(_document.Worksheets(i).Name) Next End Sub Protected Sub ButtonGo_Click(ByVal sender As Object, ByVal e As EventArgs) Dim sheet As String = DropDownList1.SelectedItem.Text If Not String.IsNullOrEmpty(sheet) Then ' Clear HTTP output Response.Clear() ' Set the content type to HTML Response.ContentType = "text/HTML" ' Save selected worksheet to output stream as HTML _document.Worksheets(sheet).SaveAsHTML(Response.OutputStream) Response.End() End If End Sub End Class

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Web.config
      
<?xml version="1.0"?> <configuration> <appSettings/> <connectionStrings/> <system.web> <!-- Set compilation debug="true" to insert debugging symbols into the compiled page. Because this affects performance, set this value to true only during development. --> <compilation debug="true" /> <!-- The <authentication> section enables configuration of the security authentication mode used by ASP.NET to identify an incoming user. --> <authentication mode="Windows" /> <!-- The <customErrors> section enables configuration of what to do if/when an unhandled error occurs during the execution of a request. Specifically, it enables developers to configure html error pages to be displayed in place of a error stack trace. <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm"> <error statusCode="403" redirect="NoAccess.htm" /> <error statusCode="404" redirect="FileNotFound.htm" /> </customErrors> --> </system.web> </configuration>

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