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Read all excel in a folder using oledbconnction C#

arunavachowdhury asked:

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1-I am having a strange problem.

Requirement: read a list of excel files on a folder and store the content on a dataset.

What I have written:
**Button click:**

protected void btnUploadExcelFiles_Click(object sender, EventArgs e)
            string[] strFiles = Directory.GetFiles(strPath);
            foreach (string strFile in strFiles)
                ClsExcelUpload objExcelUpload = new ClsExcelUpload();
                string szConnectionString1 = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + strFile + "';Extended Properties=\"Excel 12.0;HDR=YES;\"";
                objExcelUpload.ReadExcel(szConnectionString1, strFile);


**function ReadExcel:**

public string ReadExcel(string szConnectionString, string strFile)
            OleDbConnection objConn = new OleDbConnection();
            objConn.ConnectionString = szConnectionString;

            OleDbDataAdapter DAobjBasicInfo = new OleDbDataAdapter();
            DAobjBasicInfo = new OleDbDataAdapter("select * from [Sheet1$]", objConn);
            DataTable dt1 = new DataTable();
            return "";

The szConnectionString gets updated with the new filename set through the loop but when the OleDbDataAdapter opens the objConn, it looks for the Excel file which is already deleted. and the datatable everytime gets the first file data everytime.

This is the strangest thing I have ever seen as I am not able to identify the area of problem why the oledbconnection is not getting updated.

What I have tried:

The entire functions are written above.
Tags: C#, OleDb, Excel


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