c# - 如何使用 C# 获取上传的 excel 文件的工作表名称？

Question

我想使用C# 代码获取上传的excel 文件的工作表名称。该文件可能是 .xls 或 .xlsx 格式。我使用的代码如下:

protected void btnGenerateCSV_Click(object sender, EventArgs e)
{            
    string sourceFile = ExcelFileUpload.PostedFile.FileName;
    string worksheetName = ?? //(How to get the first sheetname of the uploaded file)                
    string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + sourceFile + ";Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\"";

    if (sourceFile.Contains(".xlsx"))
    strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + sourceFile + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\"";

    try
    {
        conn = new OleDbConnection(strConn);
        conn.Open();

        cmd = new OleDbCommand("SELECT * FROM [" + worksheetName + "$]", conn);
        cmd.CommandType = CommandType.Text;
        wrtr = new StreamWriter(targetFile);

        da = new OleDbDataAdapter(cmd);
        DataTable dt = new DataTable();
        da.Fill(dt);

        for (int x = 0; x < dt.Rows.Count; x++)
            {
                string rowString = "";
                for (int y = 0; y < dt.Columns.Count; y++)
                {
                    rowString += "\"" + dt.Rows[x][y].ToString() + "\",";
                }
                wrtr.WriteLine(rowString);
            }
    }
    catch (Exception exp)
    {
    }
    finally
    {
        if (conn.State == ConnectionState.Open)
        conn.Close();
        conn.Dispose();
        cmd.Dispose();
        da.Dispose();
        wrtr.Close();
        wrtr.Dispose();
    }
}

• (如何获取上传文件的第一个sheetname)string worksheetName = ??

Answer 1

我用它从 .xlsx 文件中获取工作表名称，然后遍历所有名称以一张一张地读取工作表。

OleDbConnection connection = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filename + ";Extended Properties='Excel 12.0 xml;HDR=YES;'");
connection.Open();
DataTable Sheets = connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

foreach(DataRow dr in Sheets.Rows)
{
    string sht = dr[2].ToString().Replace("'", "");
    OleDbDataAdapter dataAdapter = new OleDbDataAdapter("select * from [" + sht + "]", connection);
}