{"id":10034,"date":"2024-03-14T10:28:46","date_gmt":"2024-03-14T10:28:46","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-use-oledbconnection-in-c-to-connect-and-read-data-from-excel-files\/"},"modified":"2025-08-03T18:22:25","modified_gmt":"2025-08-03T18:22:25","slug":"how-to-use-oledbconnection-in-c-to-connect-and-read-data-from-excel-files","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-use-oledbconnection-in-c-to-connect-and-read-data-from-excel-files\/","title":{"rendered":"Read Excel Files with C# OleDbConnection"},"content":{"rendered":"

The steps to connecting and reading an Excel file using OleDbConnection are as follows:<\/p>\n

    \n
  1. Firstly, make sure that you have referenced the System.Data.OleDb namespace in your project.<\/li>\n
  2. Create an OleDbConnection object, specifying the connection string in the format of “Provider=Microsoft.ACE.OLEDB.12.0;Data Source=file path;Extended Properties=Excel 12.0;”. Here, Data Source represents the path to the Excel file.<\/li>\n<\/ol>\n
    using<\/span> System.Data.OleDb;\r\n\r\nstring<\/span> connectionString = @\"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\example.xlsx;Extended Properties=Excel 12.0;\"<\/span>;\r\nOleDbConnection connection = new<\/span> OleDbConnection(connectionString);\r\n<\/code><\/pre>\n
      \n
    1. Open the connection and run an SQL query to retrieve data from the Excel file.<\/li>\n<\/ol>\n
      connection.Open();\r\nstring<\/span> query = \"SELECT * FROM [Sheet1$]\"<\/span>;\r\nOleDbCommand command = new<\/span> OleDbCommand(query, connection);\r\nOleDbDataReader reader = command.ExecuteReader();\r\n<\/code><\/pre>\n
        \n
      1. Iterate through the OleDbDataReader object to retrieve data from an Excel file.<\/li>\n<\/ol>\n
        while<\/span> (reader.Read())\r\n{\r\n    \/\/ \u901a\u8fc7reader[\"\u5217\u540d\"]\u6765\u83b7\u53d6\u5bf9\u5e94\u5217\u7684\u6570\u636e<\/span>\r\n    string<\/span> data = reader[\"ColumnName\"<\/span>].ToString();\r\n    \/\/ \u5904\u7406\u6570\u636e<\/span>\r\n}\r\n<\/code><\/pre>\n
          \n
        1. Finally, disconnect.<\/li>\n<\/ol>\n
          reader.Close();\r\nconnection.Close();\r\n<\/code><\/pre>\n
          The above are the basic steps for connecting and reading an Excel file using OleDbConnection. In practical applications, further data processing and operations can be performed as needed.<\/p>\n","protected":false},"excerpt":{"rendered":"
          The steps to connecting and reading an Excel file using OleDbConnection are as follows: Firstly, make sure that you have referenced the System.Data.OleDb namespace in your project. Create an OleDbConnection object, specifying the connection string in the format of “Provider=Microsoft.ACE.OLEDB.12.0;Data Source=file path;Extended Properties=Excel 12.0;”. Here, Data Source represents the path to the Excel file. using […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[12254,12252,450,12253,12255],"class_list":["post-10034","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-c-database-programming","tag-c-oledbconnection","tag-c-tutorial","tag-excel-data-access","tag-excel-file-reading"],"yoast_head":"\nRead Excel Files with C# OleDbConnection - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Complete guide to reading Excel files in C# using OleDbConnection. 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