Fetch data from excel sheet

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C#

private void ReadExcelFile(int InstanceId, int ProjectID, string file, int NumberOfCrawlInstances)
        {
            string fileType = Path.GetExtension(file);
            string SourceConstr;
            System.Data.DataTable dtExcel = new System.Data.DataTable();
            dtExcel.TableName = "MyExcelData";
            if (fileType == ".xls")
            {
                SourceConstr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source='" + file + "';;Extended Properties= 'Excel 8.0;HDR=Yes;IMEX=1'";
            }
            else
            {
                SourceConstr = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + file + "';;Extended Properties= 'Excel 12.0;HDR=Yes;IMEX=1'";
            }
            OleDbConnection con = new OleDbConnection(SourceConstr);
           <big> string query = "Select * from [Sheet1$]";</big>
            OleDbDataAdapter data = new OleDbDataAdapter(query, con);
            data.Fill(dtExcel);

            int RowsCount = dtExcel.Rows.Count;
            if (RowsCount > 0)
            {
                DataTable dt = ConvertInput(dtExcel, ProjectID);
                AttributesBulkCopy(dt, RowsCount, InstanceId);
                SplitInstances(InstanceId, NumberOfCrawlInstances);
                ManageInstance(InstanceId, RowsCount, 1);
            }
        }

This is console application...Here the Select querey is fetch data from sheet 1..i want to fetch even the data in sheet2 or sheet3 how can i change that code..pls help me

Posted 9-Oct-12 20:47pm

__PP__

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2 solutions

Solution 1

string query = "Select * from [Sheet2$]";

Posted 9-Oct-12 20:49pm

MT_

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skydger · Accepted Answer · 2012-10-09T21:35:00

Firstly you should get names of the workbook's sheets, them cycle through these names and do your selects

C#

...
// OleDbConnection is built already
// Getting datatable with sheets names
System.Data.DataTable dt = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if(dt != null){
    string[] esheets = new String[dt.Rows.Count];
    int i = 0;

    // Add the sheets to an array
    foreach(DataRow row in dt.Rows){
        esheets[i] = row["TABLE_NAME"].ToString();
        i++;
    }
    // Read all the sheets you wish to select from...
   for(int j=0; j < esheets.Length; j++){
        // Use System.Data.OleDb.OleDbParameter instead of this:
        string query = "Select * from " + esheets[j];
        ...
   }
}

Good luck :)