动态网格问题 [英] Dynamic grid problem

问题描述

我有一个带有模板控件的动态网格.我有两个按钮:添加"和删除".当我绑定网格并单击添加"按钮时，最后一行数据将显示在网格中，所有数据都将被删除，并创建一个空白行.

这是我的代码:

I have a dynamic grid with a template control. I have two buttons: ADD and REMOVE. When I bind the grid and click on the Add button, the last row data is displayed in the grid and all data is removed, and a blank row is created.

Here is my code:

int rowIndex = 0;

if (ViewState["CurrentTable1"] != null)
{

   DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable1"];
   DataTable DtLast = null;
   DataRow drCurrentRow = null;

   if (dtCurrentTable.Rows.Count > 0)
   {
       for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
       {
           //extract the TextBox values

           TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].
                Cells[1].FindControl("TxtName");
           TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].
                Cells[2].FindControl("TxtStatus");
           TextBox box3 = (TextBox)Gridview1.Rows[rowIndex].
                Cells[3].FindControl("TxtAddress");
           drCurrentRow = dtCurrentTable.NewRow();
           drCurrentRow["SrNo"] = i + 1;
           drCurrentRow["Name"] = box1.Text;
           drCurrentRow["Status"] = box2.Text;
           drCurrentRow["Address"] = box3.Text;
           rowIndex++;
           DtLast.Rows.Add(drCurrentRow);
       }

       //add new row to DataTable
                  

       //Store the current data to ViewState
       ViewState["CurrentTable1"] = dtCurrentTable;

       //Rebind the Grid with the current data
       Gridview1.DataSource = dtCurrentTable;
       Gridview1.DataBind();
    }
}

有人可以帮我吗?

Can anyone please help me?

推荐答案

首先，您不应该使用Viewstate在其中存储datagrid数据.这会使页面变得很沉重，从而影响性能.

而是使用缓存.
更改后，您需要重新绑定到源.要么再次获取数据，要么在缓存/数据集中进行必要的更改，然后将其重新绑定到网格.

In first place, you should not use Viewstate to store datagrid data in it. It will make page a lot heavy and this will hit performance.

Instead use Caching.
You need a rebind to the source after the change. Either fetch the data again or make the necessary change in the cache/dataset and rebind it to the grid.

您要存储的&使用来自Viewstate
的相同Datatable [ dtCurrentTable ]重新绑定网格
因此存储&绑定数据表 DtLast

you are storing & rebinding grid with the same Datatable[dtCurrentTable] which is from Viewstate

so store & bind the Datatable DtLast

//Store the current data to ViewState
ViewState["CurrentTable1"] = DtLast;
//Rebind the Grid with the current data
Gridview1.DataSource = DtLast;
Gridview1.DataBind();

这篇关于动态网格问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！