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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 @@ERROR
ALTER 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>

SP.aspx.cs
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
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