小编JTR*_*e86的帖子

我在"adapter.Fill(dtROI)"上收到"无法在varchar上调用方法"错误.你能帮帮我吗？我试图用sql语句的适配器结果填充数据表.

protected void LoadData()
{
    DateTime StartDate = dpStartDate.Date;
    DateTime EndDate = dpEndDate.Date;

    string sql = string.Empty;

    using (SqlConnection conn = new SqlConnection())
    {
        conn.ConnectionString = ConfigurationManager.ConnectionStrings["VTC"].ConnectionString;
        conn.Open();

        sql = "select RESERVATION.MEETING_PURPOSE, RESERVATION.PROGRAM_AREA, RESERVATION.START_DATE, RESERVATION.END_DATE, " +
                     "ROI_TRACKING.ENTRY_LOCATION, ROI_TRACKING.SALARY_SAVINGS, ROI_TRACKING.TRANSPORTATION_SAVINGS, ROI_TRACKING.TOTAL_SAVINGS. " +
                     "ROI_TRACKING.TOTAL_DISTANCE, ROI_TRACKING.TOTAL_FUEL, ROI_TRACKING.TOTAL_GSA, ROI_TRACKING.TOTAL_AIRFARE, ROI_TRACKING.TOTAL_INSPECTOR_SALARY, " +
                     "ROI_TRACKING.TOTAL_MGR_SALARY, ROI_TRACKING.TOTAL_SUPERVISOR_SALARY " +
                     "from RESERVATION, ROI_TRACKING WHERE ROI_TRACKING.MEETING_ID = RESERVATION.MEETING_ID";

        using (SqlCommand cmd = new SqlCommand(sql, conn))
        {
            SqlDataAdapter adapter = new SqlDataAdapter();
            adapter.SelectCommand = cmd;

            DataTable dtROI = …

我有一个以YYYYDDMM格式存储为字符串的日期.我想以'MM/DD/YYYY'格式显示该值.我用c#编程.我使用的当前代码如下:

txtOC31.Text = dr["OC31"].ToString().Trim();
strOC31date = dr["OC31DATE"].ToString().Trim();
DateTime date31 = DateTime.Parse(strOC31date);
strOC31date = String.Format("{0:MM/dd/yyyy}", date31);

但是,我收到错误,因为YYYYMMDD字符串(strOC31date)未被识别为有效的日期时间.

我如何在C#中编写第三个VB代码？我在谷歌上找不到任何东西.

Imports XL = Microsoft.Office.Interop.Excel

Public Class LicenseRenewal

    ' The line below to C#
    Private xlRangesForRenewal As New List(Of XL.Range)

谢谢你提前和快乐星期五!