【IT168 技术文档】

    在asp.net 2.0下，gridview是十分方便的了，加一个DATASOURCE系列的控件的话，就可以马上和gridview绑定，十分方便。但其实也可以使用datatable或者dataview的，这个时候就不是用datasource系列控件了。下面讲下如何在asp.net 2.0下，实现gridview控件的翻页，各列排序，编辑的功能。
    首先，我们读取的是northwind数据库中的employee表。放置一个gridview后，添加几个绑定的列，代码如下

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None"
Width="100%" DataKeyNames="EmployeeID" OnPageIndexChanging="GridView1_PageIndexChanging" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" OnSorting="GridView1_Sorting" PageSize="3" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowCommand="GridView1_RowCommand">
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<Columns>
<asp:BoundField DataField="employeeid" HeaderText="Employee ID" ReadOnly="True" />
<asp:BoundField DataField="firstname" HeaderText="First Name" SortExpression="firstname" />
<asp:BoundField DataField="lastname" HeaderText="Last Name" SortExpression="lastname" />
<asp:CommandField ShowEditButton="True" />
</Columns>
<RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="White" />
</asp:GridView> 

    首先，我们要实现分页，把AllowPaging设置为true,并设置每页的分页条数，最后在codebehind中写入

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
...{
GridView1.PageIndex = e.NewPageIndex;
BindGrid();
} 

    为了实现每列都可以自动点击排序，可以设置allowsorting=true,然后设置OnSorting="GridView1_Sorting"，其中gridview_sorting代码为

protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
...{
ViewState["sortexpression"] = e.SortExpression;

if (ViewState["sortdirection"] == null)
...{
ViewState["sortdirection"] = "asc";
}
else
...{
if (ViewState["sortdirection"].ToString() == "asc")
...{
ViewState["sortdirection"] = "desc";
}
else
...{
ViewState["sortdirection"] = "asc";
}
}
BindGrid();
} 

    很明显，设置viewsate来保存每次排序时的顺序，上面的相信很容易理解。