gridview排序加箭头（二）

用gridview排序的时候，在.NET里是不能被标注的，下面提供如下方法：主要是显示的时候进行了下判断，然后进行不同的排序，这样就给这个gridview加上了排序的箭头，有意思的是<font face='Webdings'>个样式，如果你对<font face='Webdings'>不是很了解，下面是提供的连接：

http://www.cnblogs.com/freeton/archive/2009/06/27/1512139.html

注意：

Aspx页面：

设置排序：SortExpression="zhiwei"（给相应的字段设置）

.cs

开始设置的默认的排序状态用ViewState进行设置，写在!IsPostBack下面。

主要用到：GVpositionrecods_RowCreated与GVpositionrecods_Sorting事件

 页面

<asp:GridView AllowSorting="True" ID="GVpositionrecods" runat="server" PageSize="12"
                    AllowPaging="True" EmptyDataText="没有任何数据可以显示" Width="99%" AutoGenerateColumns="False"
                    OnRowDataBound="GVpositionrecods_RowDataBound" OnSelectedIndexChanged="GVpositionrecods_SelectedIndexChanged"
                    OnSelectedIndexChanging="GVpositionrecods_SelectedIndexChanging" OnPageIndexChanging="GVpositionrecods_PageIndexChanging"
                    OnRowCreated="GVpositionrecods_RowCreated" OnSorting="GVpositionrecods_Sorting">
                    <Columns>
                        <asp:TemplateField HeaderText="职位" SortExpression="zhiwei">
                            <ItemTemplate>
                                <a href='throwseeen2.aspx?qiyeid=<%#Eval("qiyeid")%>&id=<%#Eval("ORDER_FORM_ID") %>'>
                                    <%#Eval("zhiwei") %>
                                </a>
                            </ItemTemplate>
                            <ItemStyle HorizontalAlign="Center" />
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="企业名称" SortExpression="qiyeid">
                            <ItemTemplate>
                                <a href='seeenlist.aspx?getidforen=<%#Eval("qiyeid")%>'>
                                    <%#Eval("qiye")%>
                                </a>
                            </ItemTemplate>
                            <ItemStyle HorizontalAlign="Center" />
                        </asp:TemplateField>
                        <asp:BoundField DataField="COUNT" HeaderText="人数" SortExpression="COUNT">
                            <ItemStyle HorizontalAlign="Center" />
                        </asp:BoundField>
                        <asp:BoundField DataField="STAR_TIME" SortExpression="STAR_TIME" HeaderText="发布时间"
                            DataFormatString="{0:yyyy-MM-dd}" HtmlEncode="False">
                            <ItemStyle HorizontalAlign="Center" />
                        </asp:BoundField>
                        <asp:BoundField DataField="END_TIME" SortExpression="END_TIME" HeaderText="结束时间"
                            DataFormatString="{0:yyyy-MM-dd}" HtmlEncode="False">
                            <ItemStyle HorizontalAlign="Center" />
                        </asp:BoundField>
                        <asp:BoundField DataField="flag" HeaderText="状态">
                            <ItemStyle HorizontalAlign="Center" />
                        </asp:BoundField>
                    </Columns>
                    <AlternatingRowStyle BackColor="#E2F8FF"></AlternatingRowStyle>
                    <HeaderStyle HorizontalAlign="Center" BackColor="#99CCFF"></HeaderStyle>
                    <PagerStyle CssClass="cssPager" />
                </asp:GridView>

 默认排序设置

 protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["student"] == null)
        {
            Response.Write("<script>alert('页面已过期，请重新登录!');window.parent.frames.location.href='../Default.aspx'</script>");
        }
        else if (!IsPostBack && Session["t_resume_info"] != null)
        {
            ViewState["sortExp"] = "STAR_TIME";//默认排序的字段
            ViewState["sortDir"] = "Desc";// 字段是安什么排序的
            //绑定数据源
            bind();

            this.lbcontent.Visible = false;
        }
        else if (Session["t_resume_info"] == null)
        {
            this.lbcontent.Text = "您还没有任何录取的信息";
        }
    }

 绑定的数据源

public void bind()
    {
        //得到对应的简历的ID，从SN里面查看值
        ccwu.Model.T_RESUME_INFO listTemp = (ccwu.Model.T_RESUME_INFO)Session["t_resume_info"];
        ccwu.Model.T_ORDER_RESUME torderresume = new ccwu.Model.T_ORDER_RESUME();
        int id = Convert.ToInt32(listTemp.ID.ToString());
        //得到对应的简历的ID，从SN里面查看值


        ccwu.DAL.T_JOB jobdal = new ccwu.DAL.T_JOB();
        string where = "RESUME_INFO_ID='" + id.ToString() + "'";


        DataSet ds = jobdal.getlistResume(where);
        DataView dv = new DataView(ds.Tables[0]);
        dv.Sort = ViewState["sortExp"].ToString() + " " + ViewState["sortDir"].ToString();
        GVpositionrecods.DataSource = dv;
        this.GVpositionrecods.DataBind();
        if (this.GVpositionrecods.Rows.Count > 0)
        {

        }
        else//如果数据源是空的
        {
            //表头的设置
            GridViewRow row = new GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
            foreach (DataControlField field in this.GVpositionrecods.Columns)
            {
                TableCell cell = new TableCell();
                cell.Text = field.HeaderText;
                cell.Width = field.HeaderStyle.Width;
                cell.Height = field.HeaderStyle.Height;
                cell.ForeColor = field.HeaderStyle.ForeColor;
                cell.Font.Size = field.HeaderStyle.Font.Size;
                cell.Font.Bold = field.HeaderStyle.Font.Bold;
                cell.Font.Name = field.HeaderStyle.Font.Name;
                cell.Font.Strikeout = field.HeaderStyle.Font.Strikeout;
                cell.Font.Underline = field.HeaderStyle.Font.Underline;
                cell.BackColor = field.HeaderStyle.BackColor;
                cell.VerticalAlign = field.HeaderStyle.VerticalAlign;
                cell.HorizontalAlign = field.HeaderStyle.HorizontalAlign;
                cell.CssClass = field.HeaderStyle.CssClass;
                cell.BorderColor = field.HeaderStyle.BorderColor;
                cell.BorderStyle = field.HeaderStyle.BorderStyle;
                cell.BorderWidth = field.HeaderStyle.BorderWidth;
                row.Cells.Add(cell);
            }
            TableItemStyle headStyle = this.GVpositionrecods.HeaderStyle;
            TableItemStyle emptyStyle = GVpositionrecods.EmptyDataRowStyle;
            emptyStyle.Width = headStyle.Width;
            emptyStyle.Height = headStyle.Height;
            emptyStyle.ForeColor = headStyle.ForeColor;
            emptyStyle.Font.Size = headStyle.Font.Size;
            emptyStyle.Font.Bold = headStyle.Font.Bold;
            emptyStyle.Font.Name = headStyle.Font.Name;
            emptyStyle.Font.Strikeout = headStyle.Font.Strikeout;
            emptyStyle.Font.Underline = headStyle.Font.Underline;
            emptyStyle.BackColor = headStyle.BackColor;
            emptyStyle.VerticalAlign = headStyle.VerticalAlign;
            emptyStyle.HorizontalAlign = headStyle.HorizontalAlign;
            emptyStyle.CssClass = headStyle.CssClass;
            emptyStyle.BorderColor = headStyle.BorderColor;
            emptyStyle.BorderStyle = headStyle.BorderStyle;
            emptyStyle.BorderWidth = headStyle.BorderWidth;
            //空白行的设置
            GridViewRow row1 = new GridViewRow(0, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);

            TableCell cell1 = new TableCell();
            cell1.Text = "没有任何数据可以显示";
            cell1.BackColor = System.Drawing.Color.White;
            row1.Cells.Add(cell1);
            cell1.ColumnSpan = 6;//合并列

            if (this.GVpositionrecods.Controls.Count == 0)
            {
                GVpositionrecods.Page.Response.Write("<script language='javascript'>alert('必须在初始化表格类之前执行DataBind方法并设置EmptyDataText属性不为空!');</script>");
            }
            else
            {
                GVpositionrecods.Controls[0].Controls.Clear();
                this.GVpositionrecods.Controls[0].Controls.AddAt(0, row);
                this.GVpositionrecods.Controls[0].Controls.AddAt(1, row1);
            }
        }

    }

 关键代码

 protected void GVpositionrecods_RowCreated(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Header)//如果是表头，则执行如下操作
        {
            foreach (TableCell tc in e.Row.Cells)
            {
                //这种方法直接新加一个控件，也可以换成图片               
                if (tc.Controls.Count > 0)//这里要判断一下此时是不是已经生成了linkbutton
                {
                    string s1 = ((LinkButton)tc.Controls[0]).Text;
                    //样式Webdings是123都有自己对应的图片
                    ((LinkButton)tc.Controls[0]).Text = s1.Replace(s1, s1 + "<font face='Webdings'>5</font>");
                    //倒序的样式
                    if (tc.Controls.Count > 0 && tc.Controls[0].GetType().ToString() == "System.Web.UI.WebControls.DataControlLinkButton")
                    {
                        if (((LinkButton)tc.Controls[0]).CommandArgument.ToString() == ViewState["sortExp"].ToString())
                        {
                            string s2 = ((LinkButton)tc.Controls[0]).Text;
                            if (ViewState["sortDir"].ToString() == "Desc")
                            {
                                ((LinkButton)tc.Controls[0]).Text = s2.Replace("5", "6");
                            }
                        }
                    }
                }
            }
        }
    }

 当点击列头的时候

protected void GVpositionrecods_Sorting(object sender, GridViewSortEventArgs e)
    {
        string sPage = e.SortExpression;

        if (ViewState["sortExp"].ToString() == sPage)
        {
            if (ViewState["sortDir"].ToString() == "Desc")
                ViewState["sortDir"] = "ASC";
            else
                ViewState["sortDir"] = "Desc";
        }
        else
        {
            ViewState["sortExp"] = e.SortExpression;
        }
        bind();
    }