Question

private void button1_Click(object sender, EventArgs e)
{
   DataTable test = getDataFromXLS("c:\temp.xls");
   if (test != null)
   dataGridView1.DataSource = test;
}


private DataTable getDataFromXLS(string strFilePath)
{
   try
   {
      string strConnectionString = "";
      strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" +
                                 "Data Source=" + strFilePath + "; Jet OLEDB:Engine Type=5;" + "Extended Properties=Excel 8.0;";
      OleDbConnection cnCSV = new OleDbConnection(strConnectionString);
      cnCSV.Open();
      OleDbCommand cmdSelect = new OleDbCommand(@"SELECT * FROM [Sheet1$]", cnCSV);
      OleDbDataAdapter daCSV = new OleDbDataAdapter(); daCSV.SelectCommand = cmdSelect;
      DataTable dtCSV = new DataTable();
      daCSV.Fill(dtCSV);
      cnCSV.Close();
      daCSV = null;
      return dtCSV;
  }
  catch (Exception ex)
  {
      return null;
  }
  finally
  {
  }
  }

I found that source code to bind an excel file to a DataGridView object on a winform application on the Internet. Yet, I would like to know if there are other ways to do this instead of using ADO- or any SQL-related procedures, thanks for any help.

Answer 1

public void CreateDataTableForExcelData(String FileName) 
{
OleDbConnection ExcelConnection = null;
        string filePath = Server.MapPath(Request.ApplicationPath + "/UploadedFile/");
        DataTable dtNew = new DataTable();
        string strExt = "";
        strExt = FileName.Substring(FileName.LastIndexOf("."));
        if (strExt == ".xls")
        {
            ExcelConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + hdnFileName.Value + ";Extended Properties=Excel 8.0;");
        }
        else
        {
            if (strExt == ".xlsx")
            {
                ExcelConnection = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + hdnFileName.Value + ";Extended Properties=Excel 12.0;");
            }
        }
        try
        {
            ExcelConnection.Open();
            DataTable dt = ExcelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
            OleDbCommand ExcelCommand = new OleDbCommand(@"SELECT * FROM [" + ddlTableName.SelectedValue + @"]", ExcelConnection);
            OleDbDataAdapter ExcelAdapter = new OleDbDataAdapter(ExcelCommand);
            DataSet ExcelDataSet = new DataSet();
            ExcelAdapter.Fill(dtExcel);
            ExcelConnection.Close();

        }
        catch (Exception ex)
        {

        }
        finally
        {
        }
}