为页面索引更改提供解决方案 [英] provide a solution for page index changing

问题描述

protected void Button1_Click(object sender, EventArgs e)
  {
      if (FileUpload1.PostedFile.FileName == string.Empty)
      {
          lblMsg.Visible = true;
          return;
      }
      else
      {
          string[] FileExt = FileUpload1.FileName.Split('.');
          string FileEx = FileExt[FileExt.Length - 1];
          if (FileEx.ToLower() == "csv")
          {
           FileUpload1.SaveAs(Server.MapPath("CSVLoad//" + FileUpload1.FileName));
           lblMsg.Visible = false;
          }
          else
          {
              lblMsg.Visible = true;
              return;
          }
      }
      CSVReader reader = new CSVReader(FileUpload1.PostedFile.InputStream);
      string[] headers = reader.GetCSVLine();
      DataTable dt = new DataTable();
      foreach (string strHeader in headers)
          dt.Columns.Add(strHeader);
      string[] data;
      while ((data = reader.GetCSVLine()) != null)
      dt.Rows.Add(data);
      gv.DataSource = dt;
      gv.DataBind();
  }

protected void gv_PageIndexChanging(object sender, GridViewPageEventArgs e)
       {
          // please provide a code for grid page index changing


       }

推荐答案

浏览 Google [ ^ ]并自学。



如果您在编码时遇到任何困难，请随时回到这里询问另一个问题，描述了该场景的具体问题。

Go through some articles suggested by Google[^] and learn yourself.

If you face any difficulty while coding, feel free to come back here and ask another question with specific issue describing the scenario.

protected void gv_PageIndexChanging(object sender, GridViewPageEventArgs e)
       {
        //redo Databind() here as below or call a void using ViewState to carry e.NewPageIndex  inserting the "gv.PageIndex directly after DataBind()
        gv.DataBind();
        gv.PageIndex = e.NewPageIndex;
        }

不确定您究竟在寻找什么。

但是PageIndexChanged事件需要将PageIndex设置为新索引然后绑定GridView以使分页工作。



参考



gridview.pageindexchanging [ ^ ]



implement-paging-and-sorting-in-aspnet-Gridview- [ ^ ]



实施-Paginatio n-in-ASP.Net-Gridview-Control [ ^ ]

Not sure what precisely you are looking for.
But PageIndexChanged event needs the PageIndex to be set to new index and then Bind the GridView for the Pagination to work.

Refer

gridview.pageindexchanging[^]

implement-paging-and-sorting-in-aspnet-Gridview-[^]

Implement-Pagination-in-ASP.Net-Gridview-Control[^]

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