Gridview+SqlDataSource+分页+搜索[转载]

转自http://blog.csdn.net/ccp5780199/archive/2008/04/28/2337660.aspx
ASP.Net 2.0 中直接GridView加SqlDataSource 实现增删改的文章网上非常多了，这里就不重复了。
GridView + SqlDataSource 分页也很简单，直接点GridView的智能标示，然后启用分页。
加上搜索条件的话其实也不难，主要是要在GridView生成之前先设置好数据源。
否则就会导致点击其他分页又重新绑定了原始数据。
很简单，在这里我是利用GridView的PreRender事件，这个事件是在控件生成之前触发的，在这个事件里设置好SQL语句即可。
假设以Northwind为示例
.aspx

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            CellPadding="4" DataKeyNames="ProductID" DataSourceID="SqlDataSource1" 
            ForeColor="#333333" GridLines="None" AllowPaging="True" 
            onprerender="GridView1_PreRender">
            <FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <RowStyle BackColor="#EFF3FB" />
            <Columns>
                <asp:BoundField DataField="ProductName" HeaderText="产品名" 
                    SortExpression="ProductName" />
                <asp:BoundField DataField="SupplierID" HeaderText="SupplierID" 
                    SortExpression="SupplierID" />
                <asp:BoundField DataField="CategoryID" HeaderText="CategoryID" 
                    SortExpression="CategoryID" />
                <asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" 
                    SortExpression="UnitPrice" />
                <asp:BoundField DataField="UnitsInStock" HeaderText="UnitsInStock" 
                    SortExpression="UnitsInStock" />
                <asp:BoundField DataField="UnitsOnOrder" HeaderText="UnitsOnOrder" 
                    SortExpression="UnitsOnOrder" />
                <asp:BoundField DataField="ReorderLevel" HeaderText="ReorderLevel" 
                    SortExpression="ReorderLevel" />
                <asp:CheckBoxField DataField="Discontinued" HeaderText="Discontinued" 
                    SortExpression="Discontinued" />
                <asp:CommandField ShowDeleteButton="True" ShowEditButton="True" />
            </Columns>
            <PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
            <SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
            <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
            <EditRowStyle BackColor="#2461BF" />
            <AlternatingRowStyle BackColor="White" />
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
            ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>" 
            DeleteCommand="DELETE FROM [Products] WHERE [ProductID] = @ProductID" 
            InsertCommand="INSERT INTO [Products] ([ProductName], [SupplierID], [CategoryID], [QuantityPerUnit], [UnitPrice], [UnitsInStock], [UnitsOnOrder], [ReorderLevel], [Discontinued]) VALUES (@ProductName, @SupplierID, @CategoryID, @QuantityPerUnit, @UnitPrice, @UnitsInStock, @UnitsOnOrder, @ReorderLevel, @Discontinued)" 
            SelectCommand="select * from Products " 
            UpdateCommand="UPDATE [Products] SET [ProductName] = @ProductName, [SupplierID] = @SupplierID, [CategoryID] = @CategoryID, [QuantityPerUnit] = @QuantityPerUnit, [UnitPrice] = @UnitPrice, [UnitsInStock] = @UnitsInStock, [UnitsOnOrder] = @UnitsOnOrder, [ReorderLevel] = @ReorderLevel, [Discontinued] = @Discontinued WHERE [ProductID] = @ProductID">
            <DeleteParameters>
                <asp:Parameter Name="ProductID" Type="Int32" />
            </DeleteParameters>
            <UpdateParameters>
                <asp:Parameter Name="ProductName" Type="String" />
                <asp:Parameter Name="SupplierID" Type="Int32" />
                <asp:Parameter Name="CategoryID" Type="Int32" />
                <asp:Parameter Name="QuantityPerUnit" Type="String" />
                <asp:Parameter Name="UnitPrice" Type="Decimal" />
                <asp:Parameter Name="UnitsInStock" Type="Int16" />
                <asp:Parameter Name="UnitsOnOrder" Type="Int16" />
                <asp:Parameter Name="ReorderLevel" Type="Int16" />
                <asp:Parameter Name="Discontinued" Type="Boolean" />
                <asp:Parameter Name="ProductID" Type="Int32" />
            </UpdateParameters>
            <InsertParameters>
                <asp:Parameter Name="ProductName" Type="String" />
                <asp:Parameter Name="SupplierID" Type="Int32" />
                <asp:Parameter Name="CategoryID" Type="Int32" />
                <asp:Parameter Name="QuantityPerUnit" Type="String" />
                <asp:Parameter Name="UnitPrice" Type="Decimal" />
                <asp:Parameter Name="UnitsInStock" Type="Int16" />
                <asp:Parameter Name="UnitsOnOrder" Type="Int16" />
                <asp:Parameter Name="ReorderLevel" Type="Int16" />
                <asp:Parameter Name="Discontinued" Type="Boolean" />
            </InsertParameters>
        </asp:SqlDataSource>
        <asp:Button ID="Button1" runat="server" onclick="Button1_Click

CS代码:

 protected void Button1_Click(object sender, EventArgs e)
        {
            ViewState["search"] = this.TextBox1.Text;
        }

        protected void GridView1_PreRender(object sender, EventArgs e)
        {
            this.SqlDataSource1.SelectCommand = "select * from Products where ProductName like '%" + ViewState["search"] + "%' ";
            
        }