read excel data line by line with c# .net

Question

Does anyone know how can I read an excel file line by line in c#.

I found this code which will return the data from excel and display a grindview in c#. However, I j

Answer 1

Since Excel works with ranges you should first get the range of cells you would want to read. After that you can now browse through them using a for loop. You can see an example below:

    Excel.Application xlApp = new Excel.Application();
    Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"C:\myexcel.xlsx");
    Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[1];
    Excel.Range xlRange = xlWorksheet.UsedRange;

    int rowCount = xlRange.Rows.Count;
    int colCount = xlRange.Columns.Count;

    for (int i = 1; i <= rowCount; i++)
    {
        for (int j = 1; j <= colCount; j++)
        {
            MessageBox.Show(xlRange.Cells[i, j].Value2.ToString());
        }
    }

A more detailed explanation on this code block can be found here.

Answer 2

you can use OleDbDataReader as below

using (OleDbConnection connection = new OleDbConnection(connectionString))
{
    OleDbCommand command = new OleDbCommand(queryString, connection);

    connection.Open();
    OleDbDataReader reader = command.ExecuteReader();

    while (reader.Read())
    {
        var val1= reader[0].ToString();
    }
    reader.Close();
}

Answer 3

You must try this

        string connectionString = "";
        string strFileType = "Type";
        string path = @"C:\Users\UserName\Downloads\";
        string filename = "filename.xls";
        if (fielname.Contains(.xls))
        {
            connectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + filename + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
        }
        else if (fielname.Contains(.xlsx)
        {
            connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + filename + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
        }


        string query = "SELECT * FROM [SheetName$]";
        using (OleDbConnection connection = new OleDbConnection(connectionString))
        {
            OleDbCommand command = new OleDbCommand(query, connection);

            connection.Open();
            OleDbDataReader reader = command.ExecuteReader();

            var lines = new List<string>();
            while (reader.Read())
            {
                var fieldCount = reader.FieldCount;

                var fieldIncrementor = 1;
                var fields = new List<string>();
                while (fieldCount >= fieldIncrementor)
                {
                    fields.Add(reader[fieldIncrementor - 1].ToString());
                    fieldIncrementor++;
                }

                lines.Add(string.Join("\t", fields));
            }
            reader.Close();
        }

Answer 4

I tried the solution with OleDbConnection but it didn't work because I didn't have something installed. Then I found this solution here and it worked like a charm:

https://www.codeproject.com/Tips/801032/Csharp-How-To-Read-xlsx-Excel-File-With-Lines-of

There you can download a small file Excel.dll, add it to your project and browse the excel files cell by cell.