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Posted on 2007-10-22 08:30 webabcd 阅读(4551) 评论(16) 编辑 收藏 所属分类: LINQ&DLINQ&XLINQ
[索引页]
[源码下载]
步步为营VS 2008 + .NET 3.5(10) - DLINQ(LINQ to SQL)之调用存储过程的添加、查询、更新和删除
作者： webabcd
介绍
以Northwind为 示例数据库，DLINQ(LINQ to SQL)之调用指定存储过程的添加操作、查询操作、更新操作和删除操作
示例
相关的存储过程
 ALTER PROCEDURE [dbo].[spInsertCategory]
@CategoryName nvarchar(15),
@Description ntext,
@CategoryID int OUTPUT
AS
SET NOCOUNT ON
INSERT INTO [dbo].[Categories] (
[CategoryName],
[Description]
) VALUES (
@CategoryName,
@Description
)
SET @CategoryID = SCOPE_IDENTITY()
RETURN @@ERRORALTER PROCEDURE [dbo].[spUpdateCategory]
@CategoryID int,
@CategoryName nvarchar(15),
@Description ntext
AS
SET NOCOUNT ON
UPDATE [dbo].[Categories] SET
[CategoryName] = @CategoryName,
[Description] = @Description
WHERE
[CategoryID] = @CategoryID
RETURN @@ERROR
ALTER PROCEDURE [dbo].[spDeleteCategory]
@CategoryID int
AS
SET NOCOUNT ON
DELETE FROM [dbo].[Categories]
WHERE
[CategoryID] = @CategoryID
RETURN @@ERROR
ALTER PROCEDURE [dbo].[spSelectCategory]
@CategoryID int = null
AS
SET NOCOUNT ON
SET TRANSACTION ISOLATION LEVEL READ COMMITTED
SELECT
[CategoryID],
[CategoryName],
[Description],
[Picture]
FROM
[dbo].[Categories]
WHERE
@CategoryID IS NULL OR [CategoryID] = @CategoryID
ALTER PROCEDURE [dbo].[spSelectProduct]
@ProductID int = null
AS
SET NOCOUNT ON
SET TRANSACTION ISOLATION LEVEL READ COMMITTED
SELECT
[ProductID],
[ProductName],
[SupplierID],
[CategoryID],
[QuantityPerUnit],
[UnitPrice],
[UnitsInStock],
[UnitsOnOrder],
[ReorderLevel],
[Discontinued]
FROM
[dbo].[Products]
WHERE
@ProductID IS NULL OR [ProductID] = @ProductID
SP.aspx
  <% @ Page Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="SP.aspx.cs"
 Inherits="LINQ_DLINQ_SP" Title="调用存储过程的添加、查询、更新和删除" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
<p>
分类名称：<asp:TextBox ID="txtCategoryName" runat="server"></asp:TextBox>
分类描述：<asp:TextBox ID="txtDescription" runat="server"></asp:TextBox>
<asp:Button ID="btnAdd" runat="server" Text="添加" OnClick="btnAdd_Click" />
</p>
<asp:GridView ID="gvCategory" runat="server" DataKeyNames="CategoryID" OnSelectedIndexChanged="gvCategory_SelectedIndexChanged"
OnRowDeleting="gvCategory_RowDeleting" OnRowCancelingEdit="gvCategory_RowCancelingEdit"
OnRowEditing="gvCategory_RowEditing" OnRowUpdating="gvCategory_RowUpdating">
<Columns>
<asp:CommandField ShowSelectButton="True" ShowEditButton="True" ShowDeleteButton="True">
</asp:CommandField>
</Columns>
</asp:GridView>
<br />
<asp:DetailsView ID="dvProduct" runat="server" DataKeyNames="ProductID">
</asp:DetailsView>
</asp:Content>
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;
using DAL;
public partial class LINQ_DLINQ_SP : System.Web.UI.Page
{
 // 实例化一个NorthwindDataContext（DataContext）
// 在对象关系设计器（Object Relational Designer）中拖进来存储过程，同时NorthwindDataContext类中就会自动生成调用相应存储过程的相应方法
NorthwindDataContext _ctx = new NorthwindDataContext();
protected void Page_Load(object sender, EventArgs e)
  {
if (!Page.IsPostBack)
{
BindCategory();
 }
}
private void BindCategory()
{
var categories = _ctx.GetCategory(null);
gvCategory.DataSource = categories;
gvCategory.DataBind();
}
protected void btnAdd_Click(object sender, EventArgs e)
{
// categoryId - 用于获取存储过程的输出值（output）
int? categoryId = null;
// rtn - 用于获取存储过程的返回值（return）
int rtn = _ctx.AddCategory(txtCategoryName.Text, txtDescription.Text, ref categoryId);
Page.ClientScript.RegisterStartupScript(
this.GetType(),
"js",
string.Format("alert('output:{0},return:{1}')", categoryId.ToString(), rtn.ToString()),
true);
gvCategory.EditIndex = -1;
BindCategory();
}
protected void gvCategory_SelectedIndexChanged(object sender, EventArgs e)
{
var products = _ctx.GetProduct((int)gvCategory.SelectedValue);
dvProduct.DataSource = products;
dvProduct.DataBind();
}
protected void gvCategory_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
// rtn - 用于获取存储过程的返回值（return）
int rtn = _ctx.DeleteCategory((int)gvCategory.DataKeys[e.RowIndex].Value);
Page.ClientScript.RegisterStartupScript(
this.GetType(),
"js",
string.Format("alert('return:{0}')", rtn.ToString()),
true);
gvCategory.EditIndex = -1;
BindCategory();
}
protected void gvCategory_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
// rtn - 用于获取存储过程的返回值（return）
int rtn = _ctx.UpdateCategory(
(int)gvCategory.DataKeys[e.RowIndex].Value,
((TextBox)gvCategory.Rows[e.RowIndex].Cells[2].Controls[0]).Text,
((TextBox)gvCategory.Rows[e.RowIndex].Cells[3].Controls[0]).Text);
Page.ClientScript.RegisterStartupScript(
this.GetType(),
"js",
string.Format("alert('return:{0}')", rtn.ToString()),
true);
gvCategory.EditIndex = -1;
BindCategory();
}
protected void gvCategory_RowEditing(object sender, GridViewEditEventArgs e)
{
gvCategory.EditIndex = e.NewEditIndex;
BindCategory();
}
protected void gvCategory_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
gvCategory.EditIndex = -1;
BindCategory();
}
}
OK
[源码下载]
Feedback
@Jeffrey Zhao
老赵说的是
已经改过来了
谢谢
弱弱的问一句。。哪里体现了。存储过程与事件的挂钩。刚开始学DLINQ，还不太清楚。
@XL_ALEX
“存储过程与事件的挂钩”是什么意思？
我是想问在调用 _ctx.AddCategory的时候，程序怎么知道要调用[dbo].[spInsertCategory]存储过程。
刚刚看了你提供的源代码。
现在知道了。谢谢。
@XL_ALEX
:)
文章写得不是很详细，因为确实代码就很能说明问题了
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