Exporting data to Excel cells

[sasasasa]

How can I update an existing excel file? I want to change certain values already present in the excel file and I am using

 
Dim excelConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Test.xlsx;Extended Properties=""Excel 12.0 Xml;HRD=No""" 
        Dim excelConnection As New OleDbConnection(excelConnectionString) 
        excelConnection.Open() 
Dim strsql As String =  = "UPDATE [Sheet1$A3:A3] SET F1 = 'Test'" 
 Dim cmd1 As New OleDbCommand(strsql, excelConnection) 
            cmd1.ExecuteNonQuery() 
            excelConnection.Close()

It gives me the error saying that there is a requirement of one or more parameters. What should I do? Please help.

[MrMancunian]

What line gives you the error? Have you tried searching the MSDN for the method you are using? Most of the times, all parameters (both mandatory and optional) are listed there.

Steven

[sasasasa]

This is the actual error
"No value given for one or more required parameters."

This line is giving error
cmd1.ExecuteNon Query()

Dim excelConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Test.xlsx;Extended Properties=""Excel 12.0 Xml;HRD=No"""  
        Dim excelConnection As New OleDbConnection(excelConnectionString)  
        excelConnection.Open()  
Dim strsql As String = "UPDATE [Sheet1$A3:A3] SET F1 = 'Test'"  
 Dim cmd1 As New OleDbCommand(strsql, excelConnection)  
            cmd1.ExecuteNonQuery()  '<<<-----Error
            excelConnection.Close()

[MrMancunian]

Perhaps this link might help you: http://msdn.microsoft.com/en-us/libr...arameters.aspx

Steven