GridView中选择某行显示更多数据

最近看到看一篇关于GridView的文章!!感觉还不错，想和大家分享一下。。。

此程序实现的是选中GridView某一行后显示更多的信息。

（1）首先新建个页面，添加一个GridView控件，我以Products为例，这是源中的代码：

 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
            DataKeyNames="Pr_Id" DataSourceID="SqlDataSource1" EnableViewState="False" 
            onprerender="GridView1_PreRender">
            <Columns>
                <asp:BoundField DataField="Pr_Id" HeaderText="Pr_Id" InsertVisible="False" 
                    ReadOnly="True" SortExpression="Pr_Id" />
                <asp:BoundField DataField="Pr_Name" HeaderText="Pr_Name" 
                    SortExpression="Pr_Name" />
                <asp:CommandField ShowSelectButton="True" />
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
            ConnectionString="<%$ ConnectionStrings:testConnectionString %>" 
            SelectCommand="SELECT [Pr_Id], [Pr_Name] FROM [Products]">
        </asp:SqlDataSource>
    （2）在cs文件中，我们调用GridView1_PreRender的事件。此外我们还需要四个方法体：1， CreateRow（）；2，CreateColumn()；3， CreateDetailsView（）；4， CreateDataSourceControl()。下面是代码：

  protected void GridView1_PreRender(object sender, EventArgs e)
    {
        if (GridView1.SelectedRow != null)
        {
            Table table = GridView1.SelectedRow.Parent as Table;

            if (table != null)
            {
                CreateRow(table,GridView1.SelectedIndex);
            }
        }
    }

    private void CreateRow(Table table, int index)
    {
        GridViewRow row = new GridViewRow(-1,-1,DataControlRowType.DataRow,DataControlRowState.Normal);
        row.Cells.Add(CreateColumn());
        table.Rows.AddAt(index+2,row);
    }

    private TableCell CreateColumn()
    {
        TableCell tc = new TableCell();
        tc.ColumnSpan = GridView1.Columns.Count;
        tc.Width = Unit.Percentage(100);

        DataSourceControl ds = CreateDataSourceControl();
        tc.Controls.Add(ds);
        tc.Controls.Add(CreateDetailsView(ds));
        return tc;
    }

    private static DetailsView CreateDetailsView(DataSourceControl ds)
    {
        DetailsView dv = new DetailsView();
        dv.AutoGenerateRows = true;
        dv.DataSourceID = ds.ID;
        return dv;
    }

    private DataSourceControl CreateDataSourceControl()
    {
        SqlDataSource ds = new SqlDataSource();
        ds.ConnectionString = WebConfigurationManager.ConnectionStrings["testConnectionString"].ConnectionString;
        ds.SelectCommand = "select * from Products where  Pr_Id=@Pr_Id";
        ds.ID = "SqlDataSource2";

        Parameter cp = new Parameter("Pr_Id",TypeCode.String,GridView1.SelectedValue.ToString());
        ds.SelectParameters.Add(cp);
        return ds;
    }

（3）然后运行aspx文件，可以看到效果。

 本文转自 王祖康 51CTO博客，原文链接：http://blog.51cto.com/wzk89/361619 ，如需转载请自行联系原作者