通过ADO.NET OleDb提供程序连接到Excel工作表。然后，使用C＃的JSON库生成JSON字符串，并保存该文件。 （或使用JavascriptSerialzer，如@boades建议）

此示例使用JSON.NET库。

 使用系统; 
使用System.Linq; 
使用System.Data.OleDb; 
使用System.Data.Common; 
使用Newtonsoft.Json; 
使用System.IO; 

命名空间ConsoleApplication1 {
类程序{
 static void Main（string [] args）{
 var pathToExcel = @C：\path\to\\ \\excel\file.xlsx; 
 var sheetName =NameOfSheet; 
 var destinationPath = @C：\path\to\save\json\file.json; 

 //如果您安装了Office 2007+驱动程序，则使用此连接字符串
 //您的数据保存在.xlsx文件中
 var connectionString = String.Format（@ 
 Provider = Microsoft.ACE.OLEDB.12.0; 
数据源= {0}; 
扩展属性=Excel 12.0 Xml; HDR = YES
 pathToExcel）; 

 //创建和打开到Excel表的数据连接
使用（var conn = new OleDbConnection（connectionString））{
 conn.Open（）; 

 var cmd = conn.CreateCommand（）; 
 cmd.CommandText = String.Format（
 @SELECT * FROM [{0} $]，
 sheetName 
）; 

使用（var rdr = cmd.ExecuteReader（））{

 // LINQ查询 - 执行时将为每行创建匿名对象
 var query = 
从DbDataRecord行rdr 
选择新的{
 name = row [0]，
 regno = row [1]，
 description = row [2] 
}; 

 //从LINQ查询生成JSON 
 var json = JsonConvert.SerializeObject（query）; 

 //将文件写入目标路径
 File.WriteAllText（destinationPath，json）; 
} 
} 
} 
} 
} 
 

链接：

• 在ADO.NET中检索和修改数据 - 如何使用连接，命令和读者


• Excel 2007连接字符串


• OLEDB提供程序部分下的旧Excel连接字符串


• C＃的JSON库可以可在 JSON 页面上找到


• JSON.NET


• Microsoft Access数据库引擎2010 R可分发的，如果您没有安装Excel 2007+

I have an Excel sheet which has a set of columns and rows with data. I want to read the complete Excel sheet data as JSON, so that later I can write the JSON to a file. How can I do this?

Sample data:

Names    RegNo    Description
ABCD     12345    DemoInfo
XYZ      67890    DemoInfo2

Connect to the Excel sheet via the ADO.NET OleDb provider. Then, use a JSON library for C# to generate the JSON string, and save the file. (Or use the JavascriptSerialzer, as @boades suggested).

This example uses the JSON.NET library.

using System;
using System.Linq;
using System.Data.OleDb;
using System.Data.Common;
using Newtonsoft.Json;
using System.IO;

namespace ConsoleApplication1 {
    class Program {
        static void Main(string[] args) {
            var pathToExcel = @"C:\path\to\excel\file.xlsx";
            var sheetName = "NameOfSheet";
            var destinationPath = @"C:\path\to\save\json\file.json";

            //Use this connection string if you have Office 2007+ drivers installed and 
            //your data is saved in a .xlsx file
            var connectionString=String.Format(@"
                Provider=Microsoft.ACE.OLEDB.12.0;
                Data Source={0};
                Extended Properties=""Excel 12.0 Xml;HDR=YES""
            ",pathToExcel);

            //Creating and opening a data connection to the Excel sheet 
            using (var conn=new OleDbConnection(connectionString)) {
                conn.Open();

                var cmd=conn.CreateCommand();
                cmd.CommandText = String.Format(
                    @"SELECT * FROM [{0}$]",
                    sheetName
                );

                using (var rdr=cmd.ExecuteReader()) {

                    //LINQ query - when executed will create anonymous objects for each row
                    var query =
                        from DbDataRecord row in rdr
                        select new {
                            name = row[0],
                            regno = row[1],
                            description = row[2]
                        };

                    //Generates JSON from the LINQ query
                    var json = JsonConvert.SerializeObject(query);

                    //Write the file to the destination path    
                    File.WriteAllText(destinationPath, json);
                }
            }
        }
    }
}

Links:

• Retrieving and Modifying Data in ADO.NET - how to use connections, commands and readers
• Excel 2007 connection strings
• Older Excel connection strings under the 'OLEDB Providers' section
• JSON libraries for C# can be found on the JSON page
• JSON.NET
• Microsoft Access Database Engine 2010 Redistributable, if you don't have Excel 2007+ installed