Geek asks and answers

Problems reading Excel data, column names and sheet selection

I am using Excel Data Reader to read some data in an Entity Framework database

The code below works, but I need further clarification

First of all, IsFirstRowAsColumnNames doesn't seem to work properly, and I should use .Read instead.

I had at first to select a specific leaflet, it had plans that could help with this excelReader.Name is currently pointless if I cannot specifically skip or select the leaf that I originally used. hence the conflict.

It would also be useful to look at the actual column header names to get data, not indexes, such as var name = reader ["applicationname"]. ToString () in the SQL client;

Perhaps the best extension I could use to read in excel data if I cannot achieve the above.

public static void DataLoadAliases(WsiContext context)
    {
        const string filePath = @"Alias Master.xlsx";

        var stream = File.Open(filePath, FileMode.Open, FileAccess.Read);

        var excelReader = filePath.Contains(".xlsx")
                      ? ExcelReaderFactory.CreateOpenXmlReader(stream)
                      : ExcelReaderFactory.CreateBinaryReader(stream);

       excelReader.IsFirstRowAsColumnNames = true;


        excelReader.Read(); //skip first row

        while (excelReader.Read())
        {

            if (excelReader.Name == "Alias Master")
            {
                var aliasId = excelReader.GetInt16(0);
                var aliasName = excelReader.GetString(1);

                //Prevent blank lines coming in from excel;
                if (String.IsNullOrEmpty(aliasName)) continue;

                context.Aliases.Add(new ApplicationAlias
                {
                    AliasId = aliasId,
                    Name = aliasName,
                });
            }
            else
            {
                excelReader.NextResult();
            }
        }

        excelReader.Close();
        context.SaveChanges();
    }
+3
source share
2 answers

for the .XLSX file I use the OpenXML SDK: http://www.microsoft.com/en-us/download/details.aspx?id=30425

for the xls file, I use OleDbConnection as shown below:

 OleDbConnection oledbConn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + FilePath+ ";Extended Properties='Excel 12.0;HDR=NO;IMEX=1;';");
            oledbConn.Open();
            OleDbCommand cmd = new OleDbCommand();
            OleDbDataAdapter oleda = new OleDbDataAdapter();
            DataSet ds = new DataSet();

            DataTable dt = oledbConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);
            string workSheetName = (string)dt.Rows[0]["TABLE_NAME"];

            cmd.Connection = oledbConn;
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = "SELECT * FROM [" + workSheetName + "]";

            oleda = new OleDbDataAdapter(cmd);

            oleda.Fill(ds, "Donnees");

            oledbConn.Close();
            return ds.Tables[0];
+1
source 
        DataTable DT = new DataTable(); 
        FileStream stream = File.Open(Filepath, FileMode.Open, FileAccess.Read);
        IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
        DataSet result = excelReader.AsDataSet();
        excelReader.Close();
        DT = result.Tables[0];
0
source

More articles:


All Articles