Solved

Excel Empty Cell Value

Posted on 2003-12-04
6
1,021 Views
Last Modified: 2010-08-05
I am reading in from and excel sheet, and placing into a string.
we shall say
ExcelString = (data from excel).

Does anyone know what the value of ExcelString is if the cell was empty?
I need this for comparison, and it is in a place in the app I can't even have it output it to the screen.
I know it is not "null"
I know it is not an empty string ""
 
0
Comment
Question by:jj819430
  • 4
  • 2
6 Comments
 
LVL 18

Accepted Solution

by:
testn earned 500 total points
ID: 9876710
Again.... try DBNull.Value
0
 
LVL 7

Author Comment

by:jj819430
ID: 9876827
I am trying to use it in an if statement.

if (ExcelString != DBNull.Value)
{
}
is not capturing it... it is weird because I would have thought it would be fine.
0
 
LVL 7

Author Comment

by:jj819430
ID: 9876844
I meant

if(ExcelString != Convert.ToString(DBNull.Value))
{
}
0
Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
LVL 18

Expert Comment

by:testn
ID: 9878877
Can you put more code?

How do you connect to excel? Using COM object or OLEDB?
0
 
LVL 7

Author Comment

by:jj819430
ID: 9882862
void ConnectandRead()
{
String sConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=C:\\Files\\" + filename + ";" +"Extended Properties='Excel 8.0; IMEX=1;'";
                  
                  
                  OleDbConnection objConn = new OleDbConnection(sConnectionString);

                  
                  objConn.Open();

                  OleDbCommand objCmdSelect =new OleDbCommand("SELECT * FROM [Sheet1$]", objConn);
OleDbDataAdapter objAdapter1 = new OleDbDataAdapter();
objAdapter1.SelectCommand = objCmdSelect;
DataSet objDataset1 = new DataSet();
objAdapter1.Fill(objDataset1, "XLData");

}

After this reading of the data, I put it in a datagrid for display and editing. I convert each one into string format (by force) in order to work with another neccessary

So I have it as string ExcelString = DataGridExcel.Items[1].Cells[0].Text

I am trying to figure out what is in ExcelString if the data read from the excel sheet was a null.
0
 
LVL 7

Author Comment

by:jj819430
ID: 9884160
Nevermind, got it on my own. It was == " " (I guess it changes it to a black space if it is null during the conversions.
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
We all know that functional code is the leg that any good program stands on when it comes right down to it, however, if your program lacks a good user interface your product may not have the appeal needed to keep your customers happy. This issue can…
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question