12

有谁知道如何在 c# 中逐行读取 excel 文件。

我找到了这段代码，它将从 excel 中返​​回数据并在 c# 中显示一个grindview。但是，我只是在徘徊如何在服务器端逐行读取数据？

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();
        }    
    }
}
4

4 回答 4

16

由于 Excel 使用范围，因此您应该首先获取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());
        }
    }

可以在此处找到有关此代码块的更详细说明。

于 2013-04-23T04:07:08.710 回答
7

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();
}
于 2013-04-23T04:07:35.837 回答
1

你必须试试这个

        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();
        }
于 2018-03-21T08:21:43.357 回答
0

我尝试了使用 OleDbConnection 的解决方案，但它不起作用，因为我没有安装任何东西。然后我在这里找到了这个解决方案，它就像一个魅力：

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

在那里您可以下载一个小文件 Excel.dll，将其添加到您的项目中，然后逐个单元格地浏览 Excel 文件。

于 2020-03-04T08:52:17.030 回答