用c#.net逐行读取excel数据

Question

有谁知道如何逐行读取Excel#Excel的excel数据.

我发现这个代码将从excel返回数据并显示在c#.net的grindview上.每一个,我只是徘徊,这可以在服务器端逐行读取数据吗？

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;    
using System.Data;
using System.Data.OleDb;
using System.IO;

namespace site
{
    public partial class pgTest : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void btnImport_Click(object sender, EventArgs e)
        {
            string connString = "";
            string strFileType = Path.GetExtension(fileuploadExcel.FileName).ToLower();
            string path = fileuploadExcel.PostedFile.FileName;
            //Connection String to Excel Workbook
            if (strFileType.Trim() == ".xls")
            {
                connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=2\"";
            }
            else if (strFileType.Trim() == ".xlsx")
            {
                connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";
            }

            string query = "SELECT [username],[age],[phone] FROM [Sheet1$]";
            OleDbConnection conn = new OleDbConnection(connString);
            if (conn.State == ConnectionState.Closed)
                conn.Open();
            OleDbCommand cmd = new OleDbCommand(query, conn);
            OleDbDataAdapter da = new OleDbDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds);
            grvExcelData.DataSource = ds.Tables[0];
            grvExcelData.DataBind();
            da.Dispose();
            conn.Close();
            conn.Dispose();
        }    
    }
}

Answer 1

由于Excel适用于范围,因此您应该首先获得想要读取的单元格范围.之后,您现在可以使用for循环浏览它们.您可以在下面看到一个示例:

    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());
        }
    }

有关此代码块的更详细说明,请参见此处.

Answer 2

你可以使用OleDbDataReader如下

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();
}