中继器控制中的选定项目 [英] Selected items in repeater control

问题描述

protected void btnPDF_Click(object sender, EventArgs e)
        {

            DataTable _dtpdf = new DataTable();
            _dtpdf = (DataTable)(ViewState["TempData"]);
   
            DataTable _dtimport = new DataTable();
           
            try
            {
                string memberno = "1002,1003";
 
                DataRow[] rowsfound = _dtpdf.Select("MEMBERNO('" + memberno + "')");
                _dtpdf.Clear();
                foreach (DataRow item in rowsfound)
                {
                    _dtimport.ImportRow(item);
                }
                int j = _dtpdf.Rows.Count;
                Rpt_Company.DataSource = _dtpdf;
                Rpt_Company.DataBind();

            }
            catch (Exception ex)
            {
                throw ex;

            }

1.在上面的编码中，我创建了一个数据表
DataTable _dtpdf = new DataTable();
2. _dtpdf =(DataTable)(ViewState ["TempData"]);
并分配给viewstate

3.字符串memberno ="1002,1003";
手动在源页面中给这2个数字，我在转发器控件中仅选择这2个项目
4. DataRow [] rowsfound = _dtpdf.Select("MEMBERNO(""+ memberno +"''));


选定的项目应存储在rowsfound中……但没有发生.....请帮帮我
我正在将对象引用未设置为对象的实例
请告诉任何逻辑或纠正我的错误

1.in the above coding i created a datatable
DataTable _dtpdf = new DataTable();
2. _dtpdf = (DataTable)(ViewState["TempData"]);
and assigned to the viewstate

3. string memberno = "1002,1003";
manually i am giving this 2 numbers in the source page and i am selecting only these 2 items in the repeater control
4. DataRow[] rowsfound = _dtpdf.Select("MEMBERNO(''" + memberno + "'')");


selected item should be stored in rowsfound ......but it is not happening.....PLease help me
i am getting object refernce not set to an instance of a object
PLease tell any the logic or correct my error

推荐答案

尝试_dtpdf.Select("MEMBERNO = 1002")可以正常工作吗?

当您尝试_dtpdf.Select("MEMBERNO = 1002或MEMBERNO = 1003")时，它起作用了吗?

如果要使用in子句，请尝试使用本文.

使用带"IN"的Linq On数据表进行过滤不在"条款 [ ^ ]

Did it work when you try _dtpdf.Select("MEMBERNO=1002")?

Did it work when you try _dtpdf.Select("MEMBERNO=1002 or MEMBERNO=1003")?

If you want to use in clause, try this article.

Filter Using Linq On datatable with "IN" and "Not In" Clause[^]

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