使用带有OleDbConnection的c#从特定工作表的excel文件中获取列名

Question

到目前为止，我已经设法获得了整个excel文件的列名，但我想做的是获得给定表（表）的excel文件的列名称。我该如何修改代码来实现这一点。我已经尝试了一段时间，但没有任何积极的结果，非常感谢任何帮助。

public static List<String> ReadSpecificTableColumns(string filePath, string sheetName)
    {
        var columnList = new List<string>();
        try
        {
            var excelConnection = new OleDbConnection("provider=Microsoft.ACE.OLEDB.12.0;Data Source='" + filePath + "';Extended Properties='Excel 12.0;IMEX=1'");
            excelConnection.Open();
            var columns = excelConnection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, null);
            excelConnection.Close();
            if (columns != null)
            {
                columnList.AddRange(from DataRow column in columns.Rows select column["Column_name"].ToString());
            }
        }
        catch (Exception exception)
        {
            Console.WriteLine(exception.Message);
        }
        return columnList;
    }

Answer 1

您的代码中没有包含工作表名称
您可以尝试以下代码：

var adapter = new OleDbDataAdapter("SELECT * FROM [" +sheetName + "$]", excelConnection);
var ds = new DataSet();
adapter.Fill(ds, "myTable");
DataTable data = ds.Tables["myTable"];
foreach(DataColumn  dc in data.Columns){
...
}

Answer 2

使用这样的代码段：怎么样

var adapter = new OleDbDataAdapter("SELECT * FROM [" +sheetName + "$A1:Z1]", excelConnection);
var table = new DataTable();
adapter.Fill(table);

对于具有"0"的连接字符串；HDR＝是"；它将读取第一行，目标表将包含所有列，但没有数据。

Answer 3

您可以这样做：

    private void ValidateExcelColumns(string filePath)
    {            
        var connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties="Excel 12.0;IMEX=1;HDR=Yes;TypeGuessRows=0;ImportMixedTypes=Text""; ;
        using (var conn = new OleDbConnection(connectionString))
        {
            conn.Open();
            DataTable dt = new DataTable();
            var sheets = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
            using (var cmd = conn.CreateCommand())
            {
                cmd.CommandText = "SELECT TOP 1 * FROM [" + sheets.Rows[0]["TABLE_NAME"].ToString() + "] ";
                var adapter = new OleDbDataAdapter(cmd);
                adapter.Fill(dt);
            }
            foreach(DataColumn column in dt.Columns)
            {
                //Do something with your columns
            }
        }
    }