[英]Read data from an Excel file
I searched the official documentation, but it is focused on creating the Excel file and not on reading. 我搜索了官方文档,但重点是创建Excel文件而不是阅读。 Any code snippet as an example will help me!
任何代码片段都将对我有所帮助!
How do I read Excel data? 如何读取Excel数据?
COMPANY | DOCUMENT |
COMPANYONE | 123455986 |
COMPANYTWO | 123455986 |
COMPANYTHREE| 123455986 |
Or use Excel Interop: 或使用Excel Interop:
using Microsoft.Office.Interop.Excel;
... ...
Microsoft.Office.Interop.Excel.Application xl = new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel.Workbook workbook = xl.Workbooks.Open(@"C:\test.xlsx");
Microsoft.Office.Interop.Excel.Worksheet sheet = workbook.Sheets[1];
int numRows = sheet.UsedRange.Rows.Count;
int numColumns = 2; // according to your sample
List<string[]> contents = new List<string[]>();
string [] record = new string[2];
for (int rowIndex = 1; rowIndex <= numRows; rowIndex++) // assuming the data starts at 1,1
{
for (int colIndex = 1; colIndex <= numColumns; colIndex++)
{
Range cell = (Range)sheet.Cells[rowIndex, colIndex];
if (cell.Value != null)
{
record[colIndex-1] = Convert.ToString( cell.Value);
}
}
contents.Add(record);
}
xl.Quit();
Marshal.ReleaseComObject(xl);
I have had the same issue a while ago. 我前一段时间也遇到过同样的问题。
I used this solution to Read Data From an Excel File (.xls) in ASP.NET: http://www.dotnetcurry.com/ShowArticle.aspx?ID=138 . 我使用此解决方案从ASP.NET中的Excel文件(.xls)读取数据: http : //www.dotnetcurry.com/ShowArticle.aspx ?ID=138。
Simply read the range via SQL and post it into a GridView on the webpage. 只需通过SQL读取范围并将其发布到网页上的GridView中即可。
It looked to me simpler to understand for a not experienced ASP.NET/C# developer. 对于没有经验的ASP.NET/C#开发人员来说,它看起来更容易理解。
Here is a method that will read csv and excel data, and return as datatable 这是一种将读取csv和excel数据并作为数据表返回的方法
Note- Install-Package ExcelDataReader via nuget 注意-通过nuget 安装软件包ExcelDataReader
using Excel;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
public static DataTable LoadDataTable(string filePath)
{
string fileExtension = Path.GetExtension(filePath);
switch (fileExtension.ToLower())
{
case ".xlsx":
return ConvertExcelToDataTable(filePath, true);
case ".xls":
return ConvertExcelToDataTable(filePath);
case ".csv":
return ConvertCsvToDataTable(filePath);
default:
return new DataTable();
}
}
public static DataTable ConvertExcelToDataTable(string filePath, bool isXlsx = false)
{
FileStream stream = null;
IExcelDataReader excelReader = null;
DataTable dataTable = null;
stream = File.Open(filePath, FileMode.Open, FileAccess.Read);
excelReader = isXlsx ? ExcelReaderFactory.CreateOpenXmlReader(stream) : ExcelReaderFactory.CreateBinaryReader(stream);
excelReader.IsFirstRowAsColumnNames = true;
DataSet result = excelReader.AsDataSet();
if (result != null && result.Tables.Count > 0)
dataTable = result.Tables[0];
return dataTable;
}
public static DataTable ConvertCsvToDataTable(string filePath)
{
DataTable dt = new DataTable();
using (StreamReader sr = new StreamReader(filePath))
{
string[] headers = sr.ReadLine().Split(',');
foreach (string header in headers)
{
dt.Columns.Add(header);
}
while (!sr.EndOfStream)
{
string[] rows = sr.ReadLine().Split(',');
DataRow dr = dt.NewRow();
for (int i = 0; i < headers.Length; i++)
{
dr[i] = rows[i];
}
dt.Rows.Add(dr);
}
}
return dt;
}
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