源代码:13033480群共享
二、使用 FormView控件编辑数据
1、编辑EditItemTemplate模板,代码如下:
<EditItemTemplate> <table border="0" cellpadding="0" cellspacing="0" width="420"> <tr> <td colspan="6" height="30" width="420" align="center"> <h4>FormView EditItemTemplate 模板</h4> </td> </tr> <tr> <td width="30"> </td> <td rowspan="4" width="120"> <asp:Image ID="imgItem" runat="server" AlternateText="上传浏览图片" Height="120px" ImageUrl='<%# Eval("Image") %>' Width="120px" /></td> <td width="30"> </td> <td colspan="2"> <asp:FileUpload ID="fupImage" runat="server" Width="100%" /></td> <td width="60"> <asp:Button ID="btnUpload" runat="server" OnClick="btnUpload_Click" Text="上传" /></td> </tr> <tr> <td width="30"> </td> <td width="30"> </td> <td width="60"> 分类:</td> <td width="120"> <asp:DropDownList ID="ddlCategory" runat="server" DataSourceID="sdsCategory" DataTextField="Name" DataValueField="CategoryId"> </asp:DropDownList></td> <td width="60"> </td> </tr> <tr> <td width="30"> </td> <td width="30"> </td> <td width="60"> 名称:</td> <td width="120"> <asp:TextBox ID="txtName" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox></td> <td width="60"> </td> </tr> <tr> <td width="30"> </td> <td width="30"> </td> <td width="60"> 价格: </td> <td width="120"> <asp:TextBox ID="txtPrice" runat="server" Text='<%# Bind("Price") %>'></asp:TextBox></td> <td width="60"> </td> </tr> <tr> <td height="30" width="30"> </td> <td height="30" width="120"> </td> <td height="30" width="30"> </td> <td height="30" width="60"> </td> <td align="right" height="30" width="120"> <asp:Button ID="btnUpdate" runat="server" CommandName="Update" Text="更新" /></td> <td height="30" width="60"> <asp:Button ID="btnCancel" runat="server" CommandName="Cancel" Text="取消" /></td> </tr> </table> </EditItemTemplate>
2、为SqlDataSource控件sdsItem添加UpdateCommand命令,并添加<UpdateParameters>
UpdateCommand="UPDATE Item SET CategoryId=@CategoryId,Name=@Name,Price=@Price,Image=@Image WHERE ItemId=@ItemId"
<UpdateParameters> <asp:Parameter Name="CategoryId" /> <asp:Parameter Name="Name" /> <asp:Parameter Name="Price" /> <asp:Parameter Name="Image" /> <asp:Parameter Name="ItemId" /> </UpdateParameters>
3、编辑模板加了一个FileUpload控件,可以选择并上传图片图片,为了能在上传后显示图片,添加了一个btnUpload按钮,并添加了这个按钮的响应函数,点击后,可将文件上传,并在窗体中显示上传后的图片,代码如下:
protected void btnUpload_Click(object sender, EventArgs e) { FileUpload fup = (FileUpload)fvwItem.FindControl("fupImage"); if (fup.HasFile) { fup.SaveAs(Server.MapPath("~\\Images\\Items\\") + fup.FileName); String str = "~\\Images\\Items\\" + fup.FileName.ToString(); Image img = (Image)fvwItem.FindControl("imgItem"); img.ImageUrl = str; } else { Response.Write("<script>alert('请先浏览并选择图片')</script>"); } }
4、在模板中添加一个类别下拉列表框,为了获得一个完全的类别,只能再弄一个SqlDateSource,配置如下:
<asp:SqlDataSource ID="sdsCategory" runat="server" ConnectionString="<%$ ConnectionStrings:NetShopConnString %>" SelectCommand="SELECT CategoryId,Name FROM Category"> </asp:SqlDataSource>
5、5、编辑模板中,CategoryID和Image等参数没有双向绑定,需要在上传前给这两个参数赋值,为些,为fvwItem添加了OnItemUpdating="fvwItem_ItemUpdating"消息响应函数,代码如下:
protected void fvwItem_ItemUpdating(object sender, FormViewUpdateEventArgs e) { DropDownList ddl = (DropDownList)fvwItem.FindControl("ddlCategory"); sdsItem.UpdateParameters["CategoryId"].DefaultValue = ddl.SelectedValue; Image img = (Image)fvwItem.FindControl("imgItem"); sdsItem.UpdateParameters["Image"].DefaultValue = img.ImageUrl; }
6、在浏览器中查看运行结果。
参考网址:http://msdn.microsoft.com/zh-cn/library/system.web.ui.webcontrols.formview%28v=VS.80%29.aspx