数据库:Northwind
Table :Categories
下面的操作将实现下图中的功能
- 列表中的数据可以根据查询条件而改变
- 列表中可进行编辑,删除,选中操作
- 选中某条数据后,Details中显示详细信息
- 在详细信息显示区域,可进行新增,编辑,删除操作
这是一个非常常见的数据维护页面,在asp.net1.1中要实现以上操作,还是有一定的编码工作量,如果数据底层封装得比较好,或是使用了ORM,那么这个页面在1.1下估计是2个小时完成,而使用asp.net 2.0,10分钟搞定。
1. 新建一个SqlDataSource
<
asp:SqlDataSource
ID
="SqlDataSource1"
runat
="server"
ConnectionString
="<%$ ConnectionStrings:NorthwindConnectionString %>"
DeleteCommand
="DELETE FROM [Categories] WHERE [CategoryID] = @CategoryID"
InsertCommand
="INSERT INTO [Categories] ([CategoryName], [Description]) VALUES (@CategoryName, @Description)"
SelectCommand
="SELECT [CategoryID], [CategoryName], [Description], [Picture] FROM [Categories] WHERE CategoryName LIKE '%'+@CategoryName+'%'"
UpdateCommand
="UPDATE [Categories] SET [CategoryName] = @CategoryName, [Description] = @Description WHERE [CategoryID] = @CategoryID"
>
<
SelectParameters
>
<
asp:ControlParameter
ControlID
="TextBoxCategoryName"
Name
="CategoryName"
Type
="String"
PropertyName
="Text"
ConvertEmptyStringToNull
="False"
/>
</
SelectParameters
>
</
asp:SqlDataSource
>
- 可以使用向导完成,也可以自己手动添加
- 所有操作都由他来完成,省了很多体力活,也非常灵活,可以修改SQL语句
- 注意SelectCommand中like的写法,第一次写,还是查了半天资料的哈
- 为了实现查询时的过滤,使用在SelectCommand中添加参数,以及使用ControlParameter邦定到输入框上
2. 查询区域
Query By CategoryName:
<
asp:TextBox
ID
="TextBoxCategoryName"
runat
="server"
></
asp:TextBox
>
<
asp:Button
ID
="ButtonQuery"
runat
="server"
Text
="Query"
/>
- 添加一个按钮是为了刷新页面,以刷新SqlDataSource
3. 添加GridView
<
asp:GridView
ID
="GridView1"
runat
="server"
Width
="90%"
AutoGenerateColumns
="False"
DataKeyNames
="CategoryID"
AllowPaging
="true"
PageSize
="10"
DataSourceID
="SqlDataSource1"
CellPadding
="4"
ForeColor
="#333333"
GridLines
="None"
>
<
Columns
>
<
asp:CommandField
ShowSelectButton
="True"
/>
<
asp:BoundField
DataField
="CategoryID"
HeaderText
="CategoryID"
InsertVisible
="False"
ReadOnly
="True"
SortExpression
="CategoryID"
/>
<
asp:BoundField
DataField
="CategoryName"
HeaderText
="CategoryName"
SortExpression
="CategoryName"
/>
<
asp:BoundField
DataField
="Description"
HeaderText
="Description"
SortExpression
="Description"
/>
<
asp:CommandField
ShowEditButton
="True"
ShowDeleteButton
="True"
/>
</
Columns
>
</
asp:GridView
>
- CommandField是2.0中新增属性,可以方便的实现操作。
- 该GridView邦定到刚创建的SqlDataSource1
4.添加DetailsView
<
asp:DetailsView
ID
="DetailsView1"
runat
="server"
AutoGenerateRows
="False"
DataKeyNames
="CategoryID"
Width
="90%"
DataSourceID
="SqlDataSource1"
CellPadding
="4"
ForeColor
="#333333"
GridLines
="None"
HeaderText
="Details"
>
<
Fields
>
<
asp:BoundField
DataField
="CategoryName"
HeaderText
="CategoryName"
SortExpression
="CategoryName"
>
<
ItemStyle
Width
="90%"
/>
</
asp:BoundField
>
<
asp:BoundField
DataField
="Description"
HeaderText
="Description"
SortExpression
="Description"
/>
<
asp:CommandField
ShowDeleteButton
="True"
ShowEditButton
="True"
ShowInsertButton
="True"
/>
</
Fields
>
</
asp:DetailsView
>
- DetailsView同样也邦定到SqlDataSource1
5.实现选中GridView时DetailsView显示值连动操作
this
.DetailsView1.PageIndex
=
this
.GridView1.SelectedRow.DataItemIndex;
- 添加GrideView1的SelectedIndexChanged事件,在实践中填入上面代码,这是整个页面中唯一一个需要后台编码的地方,应该有其他方法可以实现这个操作。
整个页面实现起来非常简单,试试看,是不是只要10分钟。
先不说asp.net 2.0给负责的逻辑处理带来了什么好处,就类似于这种页面的体力活,确实帮我们省了不少!