web.config中的oledb C＃

Question

I'm trying to use excel sheet as my database. I'm converting it into a datatable. When I try to pass the connectionstring in my method it populates with an exception:

Input string was not in correct format.

And I found that error is in my Web.Config file. I used the following config:

<connectionStrings>
  <add name ="Excel07ConString" 
       connectionString="Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 12.0 Xml;Driver={Microsoft Excel Driver(*.xlsx)};DBQ=xlsx HDR={1}'"
       providerName="System.Data.OleDb"/>
</connectionStrings>

Answer 1

You are using placeholders in the connection string, such as Data Source={0} . You have to fill in the appropriate values in those placeholders, for instance Data Source='C:\\Excel Sheets\\MyFile.xslx' .

Answer 2

You can try following connection string:

    <connectionStrings>
       <add name ="Excel07ConString" connectionString="Provider=Microsoft.ACE.OLEDB.12.0; data source=&quotD:\Desky\Excel_to_Datatable\Excel_to_Datatable\Files\DB in Excel.xlsx&quot; Extended Properties=&quotExcel 12.0;IMEX=1&quot;" providerName="System.Data.OleDb"/> 

Answer 3

You need to substitute some values in place of {0}(data source) and {1}(HDR).

Provider=Microsoft.ACE.OLEDB.12.0;Data Source=<data source here>;
Extended Properties='Excel 12.0 Xml;Driver={Microsoft Excel 
Driver(*.xlsx)};DBQ=xlsx HDR=<Yes/No>

"HDR=Yes;" indicates that the first row contains columnnames, not data. "HDR=No;" indicates the opposite.

"Data Source" Indicates source file path.