GridView排序将页面重置为原始数据

时间:2011-12-12 04:28:02

标签: c# asp.net sql visual-studio-2005

我们,我正在使用VS2005 C#和SQL Server 2005。

我的 GridView 搜索,我想使用GridView的 Sort 函数来对搜索结果进行排序。< / p>

但是,每次我对结果进行过滤后,当我按下标题对我的 DataGrid 进行排序时,它总是会将 GridView 重置为原始的完整数据。桌子。

E.g。

a)我的网页加载了一个包含58名学生数据的网格视图。

b)我在 Names 下搜索 James ,并在GridView中显示18个结果。

c)我按下标题 Class 按类对结果进行排序。

d)GridView刷新并返回原来的58名学生的完整列表。


我试过了:

  1. 在单独的网页上实施搜索表,使其不会与原始网格视图发生冲突。

  2. 将gridview名称更改为其他名称。


  3. 我意识到:

    当我将指针悬停在标题上方时,它将始终显示 javascript:_doPostBack('ctl00$MainContent$GridView1,Sort$Issue)

    即使我可能已将GridView1更改为其他名称


    我需要一些解决方案来排序gridview中的搜索结果,而不是在我对其进行排序时将原始数据恢复。

2 个答案:

答案 0 :(得分:1)

我已经使用ViewState实现了以下列方式存储排序方向(ASC或DESC):

protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
    {
        listBindByName(); //this would be your procedure to look for the data you want
        DataSet dsSortTable = GridView1.DataSource as DataSet;
        DataTable dtSortTable = dsSortTable.Tables[0];
        if (dtSortTable != null)
        {
            DataView dvSortedView = new DataView(dtSortTable);
            dvSortedView.Sort = e.SortExpression + " " + getSortDirectionString();
            ViewState["sortExpression"] = e.SortExpression;
            GridView1.DataSource = dvSortedView;
            GridView1.DataBind();
        }
        UpdatePanel1.Update();
    }

    private string getSortDirectionString()
    {
        if (ViewState["sortDirection"] == null)
        {
            ViewState["sortDirection"] = "ASC";
        }
        else
        {
            if (ViewState["sortDirection"].ToString() == "ASC")
            {
                ViewState["sortDirection"] = "DESC";
                return ViewState["sortDirection"].ToString();
            }
            if (ViewState["sortDirection"].ToString() == "DESC")
            {
                ViewState["sortDirection"] = "ASC";
                return ViewState["sortDirection"].ToString();
            }
        }
        return ViewState["sortDirection"].ToString();
    }

如果有任何疑问,请告诉我。

答案 1 :(得分:0)

假设您在Page load

中为Bind调用gridview时
  protected void Page_Load(object sender, EventArgs e)
    {  
         fillgrid(false, string.Empty, false); //
    }

  public void fillgrid(bool sorting, string sortexpression, bool sortdir)
    {
          //binding codes 
           var data = from item in DBcontent.Tablename 
                      select new
                      {
                          Title = item.Title
                      }  
             if (sorting)
                    {
                        if (sortexpression == "Title")
                        {
                            if (sortdir)
                            {
                                GrieviewID.DataSource = data.OrderBy(id => id.Title).ToList();
                            }
                            else
                            {
                                GrieviewID.DataSource = data.OrderByDescending(id => id.Title).ToList();
                            }
                        }
                   else
                    {
                        GrdID.DataSource = data.OrderByDescending(id => id.StartDate).ToList();
                    }
                GrdID.DataBind();
    }

  protected void grdevents_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        grdevents.PageIndex = e.NewPageIndex;
        BindAndSortGrid();
    }

    /// <summary>
    /// Gets the sort direction.
    /// </summary>
    /// <param name="column">The column.</param>
    /// <returns></returns>
    private string GetSortDirection(string column)
    {
        // By default, set the sort direction to ascending.
        string sortDirection = "ASC";

        // Retrieve the last column that was sorted.
        string sortExpression = ViewState["SortExpression"] as string;

        if (sortExpression != null)
        {
            // Check if the same column is being sorted.
            // Otherwise, the default value can be returned.
            if (sortExpression == column)
            {
                string lastDirection = ViewState["SortDirection"] as string;
                if ((lastDirection != null) && (lastDirection == "ASC"))
                {
                    sortDirection = "DESC";
                }
            }
        }

        // Save new values in ViewState.
        ViewState["SortDirection"] = sortDirection;
        ViewState["SortExpression"] = column;

        return sortDirection;
    }

    /// <summary>
    /// Bind and sort grid.
    /// </summary>
    private void BindAndSortGrid()
    {
        bool sortdir;
        if (ViewState["SortDirection"] != null && ViewState["SortExpression"] != null)
        {
            sortdir = ViewState["SortDirection"].ToString() == "ASC" ? true : false;
            fillgrid(true, ViewState["SortExpression"].ToString(), sortdir);
        }
        else
            fillgrid(false, string.Empty, false);
    }

    protected void grdevents_Sorting(object sender, GridViewSortEventArgs e)
    {
        bool sortdir = GetSortDirection(e.SortExpression) == "ASC" ? true : false;
        fillgrid(true, e.SortExpression.ToString(), sortdir);
    }

按照以下代码...希望得到帮助