如何在单击列标题时对网格视图中的记录进行排序

Posted 2021-04-11

我希望在用户单击列标题时按列对网格视图进行排序。在这里，用户可以单击任何列，并根据单击的列对网格视图进行排序。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，没有任何反应。我在gvEmployeeStatus_Sorting事件上设置了断点，以检查它何时被触发。它没有被解雇。我该怎么排序记录!!

答案

正如你提到的排序没有被触发，我想你错过了SortExpression中的属性<asp:TemplateField> or <asp:BoundField>

例如，

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

要么

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

另一答案

在aspx页面上将此属性设置为gridview。

onsortcommand="ComponentGridView_Sorting。

然后将它放在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;
    }
}

另一答案

#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