'student_excel $'不是有效名称

Question

    private void btnSelectFile_Click(object sender, EventArgs e)
    {
        OpenFileDialog openfiledialog1 = new OpenFileDialog();
        openfiledialog1.ShowDialog();
        openfiledialog1.Filter = "allfiles|*.xlsx";
        openfiledialog1.Filter = "allfiles|*.xlsm";
        txtfilepath.Text = openfiledialog1.FileName;
    }
    private void btnUpload_Click(object sender, EventArgs e)
    {
        string path = txtfilepath.Text;

        string ConnString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0;";
        DataTable Data = new DataTable();

        using (OleDbConnection conn = new OleDbConnection(ConnString))
        {
            conn.Open();

            OleDbCommand cmd = new OleDbCommand(@"SELECT * FROM [Student_excel$]", conn);
            OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);
            adapter.Fill(Data);

            conn.Close();
        }
        string ConnStr = MyConString;
        using (SqlBulkCopy bulkCopy = new SqlBulkCopy(ConnStr))
        {
            bulkCopy.DestinationTableName = "dbo.Student_excel";
            bulkCopy.ColumnMappings.Add("userid", "userid");
            bulkCopy.ColumnMappings.Add("name", "name");
            bulkCopy.ColumnMappings.Add("age", "age");
            bulkCopy.ColumnMappings.Add("location", "location");
            bulkCopy.WriteToServer(Data);
            MessageBox.Show("UPLOAD SUCCESSFULLY");
        }
    }

当我将一些Excel文件（ExcelBook1.xlsx）导入windowsFormApplication时，Visual Studio会给我一些错误：

  

'Student_excel $'不是有效名称。确保它不包含无效字符或标点符号，并且不会太长。