C# - How To Communicate An Excel Workbook
Apr 22, 2010Is there a way to load an Excel document in a web page and communicate with the excel control using code behind? (JavaScript or Asp.NET) ?
View 1 RepliesIs there a way to load an Excel document in a web page and communicate with the excel control using code behind? (JavaScript or Asp.NET) ?
View 1 RepliesI have datatable with records and i have existng Excel file in my application temp folder i want to export datatable records in this excel file workbook and i want to convert this excel workbook into byte array and i want to send this byte array in reponse.write to user to give download excel file option
View 6 RepliesI have a scenario where I have to read an excel file to dump records in a mysql database. The code generates an exception Sheet1 not found. I have pasted the code below. Please let me know the solution to the exception. I have given the correct read/write/modify settings to my excel file.
if (fileUpload1.PostedFile.FileName.EndsWith(".xls") || fileUpload1.PostedFile.FileName.EndsWith(".XLS"))
{
string fileName = Server.MapPath(fileUpload1.PostedFile.FileName);
string connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + fileName + ";Extended Properties=Excel 8.0";
// Create the connection object
OleDbConnection oledbConn = new OleDbConnection(connString);
try
{
// Open connection
oledbConn.Open();
// Create OleDbCommand object and select data from worksheet Sheet1
OleDbCommand cmd = new OleDbCommand("SELECT * FROM [Sheet1$]" , oledbConn);
// Create new OleDbDataAdapter
OleDbDataAdapter oleda = new OleDbDataAdapter();
oleda.SelectCommand = cmd;
// Create a DataSet which will hold the data extracted from the worksheet.
DataSet ds = new DataSet();
// Fill the DataSet from the data extracted from the worksheet.
oleda.Fill(ds, "RestaurantExcelData");
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
Response.Write("Data: " + ds.Tables[0].Rows[i].ItemArray[0].ToString() + "");
}
}
catch(Exception e1)
{
}
finally
{
// Close connection
oledbConn.Close();
}
}
else
{
Response.Write("File Not Excel (xls||XLS)");
}
am new to vb.net programming. i am trying to read an existing excel 2007 file from vb.net i used a form with single button and i written code in button click event
Imports Excel = Microsoft.Office.Interop.Excel
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim xlApp As Excel.Application
Dim xlWorkBook As Excel.Workbook
Dim xlWorkSheet As Excel.Worksheet
xlApp = New Excel.ApplicationClass
xlWorkBook = xlApp.Workbooks.Open("C:Documents and SettingsUSERDesktopd0805
[code]...
How to connect with excel workbook 2003 for storing data similar to database. I am using c#.net.
View 3 RepliesI am building an windows application using visual studio 2005. I want to retreive data from excel workbook and i want to display the retreived data in a drop down menu.
I have few question regarding this process.
1. How do we connect to excel using ADODB.Connection.
let me know following code snippet works or not.
Dim cn as ADODB.Connection
Set cn = New ADODB.Connection
With cn
.Provider = "Microsoft.Jet.OLEDB.4.0"
.ConnectionString = "Data Source=C:MyFolderMyWorkbook.xls;" & _
"Extended Properties=Excel 8.0;"
.Open
End With
2:How do we access and manupilate individual column from excel worksheet?
Since i am new to .Net environment i need detailed explanation about whole process.
I want to develop an interactive website in ASP.Net and what I mean by interactive is that it has a back-end application to provide real-time logic (which does not follow HTTP's model of Request/Response) and eventually it is provided with dynamic *.aspx pages with an SQL Server database.
And how would the components go together (as a design and as a communication mechanism) to have a scalable application?
EDIT: Ok, the story is as you know, we all are tending to get something more vital than HTTP model, I want my back-end application to be persistent working in real-time, for example, It would have some constant-intervals to do some queries on the database.
The design as I picture it is a server (holding an ASP.Net website, the back-end application and the database), the design may get more hybrid with time. The website is the interactive interface for the users, the website needs (sometimes) intensive calculations and queries which better be handled by the back-end application, then the application delivers the website the info to be wrapped and formatted as HTML markup to be returned the user eventually.
I have a very huge Asp.Net application using Asp.net 3.5 with aournd 3000 pages. Now we need to integrate some Silverlight controls in it. For e.g we need to change the dashborad to incorporate new SL UX. My question is that easy to use these 2 technologies i.e. Asp.Net and SL and both have different projects. Will that be difficult for us to communicate with each of these web applications and SL Application. We are in the middle of making a decision as to how to integrate SL in our exisiting application.
Keep in mind that its out of the question that we can shift the whole application to SL. We must have to stick to asp.net 3.5 or 4
Problem: I have two pages. Page1 and Page2. When I Click Page1_Button it redirects to Page2 with a Querystring value. In Page2 I do some processing and click save button. My database will get updated and at the same time when I do this my Page1 should also get updated with new values from database. I have a function in Page1 that does this. So my question is How do I call this function in page1 without loosing the previous data on page1 by forcing it to reload? Or in other words Is it possible to call a codebehind function of one page from codebehind of another page without loosing the data or loading the entire page?
View 5 RepliesHow do I create a Inbox so that users can commnuicate in asp.net What controls do I need.I am ok with the Databse part of this project. But the design part is confusing I am using Visula web developer 2010. Not using ajax and silverlight. just asp.net This is my first asp.net project.
View 6 RepliesHow to communicate with applications which build in lets say SAP,Java,Ruby or any other technology through web services
View 3 RepliesI'm currently developing a website using ASP.NET MVC.I need this website to communicate with an external API using HTTP Post.
I'm unsure whether I should be coding this up in ASP.NET to perform the http post requet and read the response, or whether I should be coding this up in a c# class.It seems when developing a site, you have the option to chose either for many scenarios.
I am new to .net and i'm stuck with the following issue.
I have a windows GUI application and i need to communicate with a firewall using HTTPS protocol. I did some search on google and the results retrieved showed to use HTTPWebRequest and HTTPWebResponse objects.
But does this objects us HTTP protocal or does it work for HTTPS also. also is SSL required for HTTPS protocol. For SSL we need some security certificate. How to retrieve that certificate. Will a certificate need to available in each client machine
I'm trying to make a client-server app using SOAP. The communication btw the client and gateway will be done using SOAP messging. I was wondering if it's possible for the gateway to communicate with my backend servers using SOAP as well(blue lines)? will I need to create a second interface/port for the gateway and servers so they can communicate. or is there an easier way to do it bust still using SOAP
View 2 RepliesI have always continued to keep all of my code in codebehind that I would need to be secure, and don't make any calls to my database with javascript out of concern that a hacker could see the strconnection, username, ect. Is there a highly secure way to communicate with an sqldatabase with Javascript, or should I continue to do things the way I have done them?
View 3 RepliesCurrently I am facing a problem to communicate with a server that enable ssl...
normally we are using TCPClient to send and receive data from server, but now the server that I trying to connect to, need SSL and certificate..
I was trying to search at google and most of the solutions i got it is use SSLStream and X509Certificates. and I have another question, Am I need to create Client and Listener in order to communicate with that server? Because I had reviewed all the sample and they didn't attach the private key when send request to server.
i have a gridview in updatepannel, i want to display selected row's content in a text box which is outside the pannel. at the time of selection nothing appear in textbox. but if i put gridview outside the pannel then code works fine.
View 4 Repliesi need to be able to expose information to a page, and I need to write the information in xml on my webserver which will be dynamically created from the database.
I need to use json to pass the data from the screen back to the server two way communication xms back and forth. Is it actually any good using a wcf endpoint to serve the json back to the page and use query with wcf? Is this possible?
Or is it easier to use standard pages .aspx and just do a call to a url and get the json with jquery....
We will probably want to send this information to other locations at some point in the future too....
I want to make my visualwebpart to communicate with other webparts like (Provider and Consumer) I am thinking can I make my VisualWebPart which has a ascx file which is drived from UserControl, can I make it a Provider or a Consumer. I am adding these webparts on Sharepoint 2010 webpartpage.
View 3 RepliesIf i wanted to communucate from two application server to one SqlServer,what are the drawbacks if i implemented a senario like this, at the same time wat are the advantages.
View 5 RepliesI have developed a Web and windows application, both in C#.NET. Now, what I would like to do is when a button is clicked on a particular page in the web application, a signal has to be sent to the windows app saying a link has been clicked. How could I do this really easily? I would like to stay away from socket programming...
I thought of the web app storing cookies and the desktop application monitoring the cookies folder but that seems a bit clumsy.
How can I export data from a Gridview to excel and once exported the data should be formatted in right to left (arabic) manner. How can I achieve this?
View 2 RepliesI've got an .rdlc report which I print from my .net app (C# Visual Studio 2005), where I use a RemoteReportPrinter object. I give it as parameters the server name, report name, report parameters, etc. Works fine. My question is, I would live to do an analagous export of that report to Excel. Set it up exactly the same, but have it export to Excel rather than print, probably using some other type of object than RemoteReportPrinter.
View 1 Repliesi use this code to export data into word.
Protected Sub Export(sender As Object, e As EventArgs) Handles btn_printexcel.Click
Response.Clear()
Response.Buffer = True
[Code]....
but the export docs will be downloaded into the user computer.
what should i do so that the exported docs is save into the server?
I need to auto fit the dropdown width to auto fit with the cell in excel using c#.net.
I have exported the dropdown to the excel using c#.
when the column width of the cell is increated, the width of the dropdown should be auto fit to the width of the cell.