Solved

Excel Empty Cell Value

Posted on 2003-12-04
6
1,014 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
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
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

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

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…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Internet Business Fax to Email Made Easy - With eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, fr…

895 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

Need Help in Real-Time?

Connect with top rated Experts

11 Experts available now in Live!

Get 1:1 Help Now