如何在单击列标题时对网格视图中的记录进行排序

Posted 2023-03-12

【中文标题】如何在单击列标题时对网格视图中的记录进行排序

【英文标题】：How to sort records in grid view on click of header of a column

【发布时间】：2014-08-10 21:18:06

【问题描述】：

当用户单击列标题时，我想按列对网格视图进行排序。在这里，用户可以单击任何列，并且网格视图根据单击的列进行排序。这是我的代码：

<asp:GridView ID="gvEmployeeStatus" runat="server" AutoGenerateColumns="false" AllowPaging="True" PageSize="10" AllowSorting="true" OnPageIndexChanging="gvEmployeeStatus_PageIndexChanging" OnSorting="gvEmployeeStatus_Sorting" >

 protected void gvEmployeeStatus_Sorting(object sender, GridViewSortEventArgs e)
    
        loginName = (String)(Session["LoginName"]);
        dsLoginDetail = clsBLogic.TblLogin(loginName);                
        tblEmployeeNo = dsLoginDetail.Tables[0].Rows[0]["EmployeeNo"].ToString();
        BindDataTogvEmployeeStatus(tblEmployeeNo);

        DataTable dataTable =    gvEmployeeStatus.DataSource as DataTable;
        if(dataTable != null)
        
            DataView dataView = new DataView(dataTable);
            dataView.Sort = e.SortExpression + " " + ConvertSortDirection(e.SortDirection);
            gvEmployeeStatus.DataSource = dataView;
            gvEmployeeStatus.DataBind();
        

    

    private string ConvertSortDirection(SortDirection sortDirection)
    
         string newSortDirection = String.Empty;

        switch (sortDirection)
        
            case SortDirection.Ascending:
                newSortDirection = "ASC";
                break;

            case SortDirection.Descending:
                newSortDirection = "DESC";
                break;
        

        return newSortDirection;
    

网格视图中的记录来自数据集。现在，当我运行代码时，什么也没有发生。我在 gvEmployeeStatus_Sorting 事件上设置了断点来检查它何时会被触发。它没有被解雇。我怎样才能对记录进行排序！

【参考方案1】：

正如你提到的排序没有触发，我猜你在<asp:TemplateField> or <asp:BoundField>中缺少属性SortExpression

例如，

 <asp:TemplateField HeaderText="Your Header 1" SortExpression="ColumName1">

或

<asp:BoundField DataField="Your Header 1" HeaderText="Your Header 1" SortExpression="ColumName1" />

【讨论】：

我已经包含了排序表达式。标题文本带有下划线，页面是回发但记录没有排序。

@AgustusCodes : 请问，控件进入gvEmployeeStatus_Sorting()函数？

我在这里持怀疑态度..为了测试这个，我在这个函数中放置了断点但是断点没有进入这里？？

【参考方案2】：

在 aspx 页面上将此属性设置为 gridview。

onsortcommand="ComponentGridView_Sorting.

然后把它放在aspx.cs页面的后端。

protected void Datagrid1_SortCommand(object source, DataGridSortCommandEventArgs e)

    string strSQL;
    DataTable dt;
    strSQL = "(SQL SELECT STATEMENT HERE)";
    dt = strSQL;
        
            string SortDir = string.Empty;
            if (dir == SortDirection.Ascending)
            
                dir = SortDirection.Descending;
                SortDir = "Desc";
            
            else
            
                dir = SortDirection.Ascending;
                SortDir = "Asc";
            
            DataView sortedView = new DataView(dt);
            sortedView.Sort = e.SortExpression + " " + SortDir;
            Datagrid1.DataSource = sortedView;
            Datagrid1.DataBind();
        

protected SortDirection dir

    get
    
        if (ViewState["dirState"] == null)
        
            ViewState["dirState"] = SortDirection.Ascending;
        
        return (SortDirection)ViewState["dirState"];
    
    set
    
        ViewState["dirState"] = value;
    

【参考方案3】：

#region For Grid view Header Sorting..!!
    public SortDirection dir
    
        get
        
            if (ViewState["dirState"] == null)
            
                ViewState["dirState"] = SortDirection.Ascending;
            
            return (SortDirection)ViewState["dirState"];
        
        set
        
            ViewState["dirState"] = value;
        
    

    protected void grdAdd_Sorting(object sender, GridViewSortEventArgs e)
    
        string sortingDirection = string.Empty;
        if (dir == SortDirection.Ascending)
        
            dir = SortDirection.Descending;
            sortingDirection = "Desc";
        
        else
        
            dir = SortDirection.Ascending;
            sortingDirection = "Asc";
        
        DataTable dtgrd = AdditionBL.BindAdditionMaster();/**Data Table Bind For Short View**/
        DataView sortedView = new DataView(dtgrd);
        sortedView.Sort = e.SortExpression + " " + sortingDirection;
        grdAddition.DataSource = sortedView;
        grdAddition.DataBind();
    
    #endregion