Ext.grid.Panel远程加载数据分页，提供添加删除修改等操作
Ext.grid.Panel远程加载NorthWind中Customers数据，并提供分页、添加、删除、修改和查看操作，界面如下图：
Ext.grid.Panel Ajax加载数据
添加界面
修改界面
查看界面
Extjs代码如下：
//Ext.grid.Panel动态加载和读取相关Customers信息
Ext.onReady(function ()
{
Ext.QuickTips.init();
Ext.Loader.setConfig({ enable: true });
//定义数据模型
var myModel = Ext.define("Customers", {
extend: "Ext.data.Model",
fields: [
{ name: "CustomerID", type: "string" },
{ name: "CompanyName", type: "string" },
{ name: "ContactName", type: "string" },
{ name: "ContactTitle", type: "string" },
{ name: "Address", type: "string" },
{ name: "City", type: "string" },
{ name: "Region", type: "string" },
{ name: "PostalCode", type: "string" },
{ name: "Country", type: "string" },
{ name: "Phone", type: "string" },
{ name: "Fax", type: "string" }
]
});
//定义一个Ext.data.Store对象
var customerStore = Ext.create("Ext.data.Store", {
//指定数据记录
model: "Customers",
//设置分页大小
pageSize:15,
//使用Proxy指定加载远程数据
proxy: {
type: "ajax",
url: "/AjaxHandler/getCustomersByUSA.ashx",
reader: {
type: "json",
root: "data",
//获取数据总数
totalProperty:"totalCount"
}
},
autoLoad: true
});
//定义分页
var pagebar = Ext.create("Ext.toolbar.Paging", {
store: customerStore,
displayInfo: true,
displayMsg: "显示{0}-{1}条，共计{2}条",
emptyMsg: "没有数据"
});
//定义Ext.grid.Panel组件
var grid = Ext.create("Ext.grid.Panel", {
title: "Ext.grid.Panel使用Ajax方式加载远程数据",
width: "75%",
height: 450,
store: customerStore,
columnLines: true, //设置列线
rowLines:true, //设置行线
renderTo: Ext.getBody(),
iconCls:"icon-grid",
tbar:[{
xtype: "button",
frame:true,
text: "添加",
scale: "small",
tooltip: "添加Customers",
cls: "x-btn-icon",
//icon: "/ext-4.0.7-gpl/examples/button/images/add.gif",
icon:"../icons/add.png",
iconCls:"add",
handler:AddCustomerFn
}],
//分页功能
bbar:pagebar,
//定义grid包含的所有数据列
columns: [
{ text: "CustomerID", dataIndex: "CustomerID",align:"center" },
{
text: "CompanyName", dataIndex: "CompanyName",align:"center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "ContactName", dataIndex: "ContactName", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "ContactTitle", dataIndex: "ContactTitle", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "Address", dataIndex: "Address", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "City", dataIndex: "City", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "Region", dataIndex: "Region", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "PostalCode", dataIndex: "PostalCode", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "Country", dataIndex: "Country", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "Phone", dataIndex: "Phone", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "Fax", dataIndex: "Fax", align: "center",
editor: { xtype: "textfield", allowPattern: false }
},
{
text: "操作", align:"center",html:"操作",
xtype: "actioncolumn",
items: [
{
icon: "/images/edit.gif",
tooltip: "编辑",
handler: editFn, //指定单击”编辑“按钮的事件处理函数
align: "center",
width:"100"
},
{
icon: "/images/del.gif",
handler: deleteFn, //指定单击”删除“按钮的事件处理函数
tooltip: "删除",
align: "center",
width:"100"
},
{
icon: "/images/save.gif",
handler: lookFn, //指定单击”查看“按钮的事件处理函数
tooltip: "查看",
width:"100"
}
]
}
]
});
//加载数据
customerStore.load({ params: { start: 0, limt: 15 } });
//定义编辑窗口
var editWin;
//定义editFn编辑函数
function editFn(grid,rowIndex,colIndex)
{
//获取当前选中行的数据
var rec = grid.getStore().getAt(rowIndex);
if (editWin)
{
editWin.setTitle("编辑《" + rec.get("CustomerID") + "》");
//给form组件赋值
var formFields = editWin.items.get(0).items;
formFields.get(0).setValue(rec.get("CustomerID"));
formFields.get(1).setValue(rec.get("CompanyName"));
formFields.get(2).setValue(rec.get("ContactName"));
formFields.get(3).setValue(rec.get("ContactTitle"));
formFields.get(4).setValue(rec.get("Address"));
formFields.get(5).setValue(rec.get("City"));
formFields.get(6).setValue(rec.get("Region"));
formFields.get(7).setValue(rec.get("PostalCode"));
formFields.get(8).setValue(rec.get("Country"));
formFields.get(9).setValue(rec.get("Phone"));
formFields.get(10).setValue(rec.get("Fax"));
}
else
{
editWin = Ext.create("Ext.window.Window", {
title: "编辑《" + rec.get("CustomerID") + "》",
items: [
{
// url: "/AjaxHandler/UpdateCustomers.ashx",
xtype: "form",
width: "100%",
bodyPadding: 10,
items: [
{
xtype: "textfield",
name: "CustomerID",
readOnly: true,
value: rec.get("CustomerID"),
fieldLabel: "CustomerID",
id:"CustomerID"
},
{
xtype: "textfield",
name: "CompanyName",
value: rec.get("CompanyName"),
fieldLabel: "CompanyName",
id:"CompanyName"
},
{
xtype: "textfield",
name: "ContactName",
value: rec.get("ContactName"),
fieldLabel: "ContactName",
id:"ContactName"
},
{
xtype: "textfield",
name: "ContactTitle",
value: rec.get("ContactTitle"),
fieldLabel: "ContactTitle",
id:"ContactTitle"
},
{
xtype: "textfield",
name: "Address",
value: rec.get("Address"),
fieldLabel: "Address",
id:"Address"
},
{
xtype: "textfield",
name: "City",
value: rec.get("City"),
fieldLabel: "City",
id:"City"
},
{
xtype: "textfield",
name: "Region",
value: rec.get("Region"),
fieldLabel: "Region",
id:"Region"
},
{
xtype: "textfield",
name: "PostalCode",
value: rec.get("PostalCode"),
fieldLabel: "PostalCode",
id:"PostalCode"
},
{
xtype: "textfield",
name: "Country",
value: rec.get("Country"),
fieldLabel: "Country",
id:"Country"
},
{
xtype: "textfield",
name: "Phone",
value: rec.get("Phone"),
fieldLabel: "Phone",
id:"Phone"
},
{
xtype: "textfield",
name: "Fax",
value: rec.get("Fax"),
fieldLabel: "Fax",
id:"Fax"
}
]
}
],
listeners: {
beforedestroy: function (cmp)
{
this.hide();
return false;
}
},
bbar: [
{ xtype: "tbfill" },
{
text: "确定", handler: function ()
{
//获取表单，实际返回的是Ext.form.Basci对象
var form = editWin.items.get(0).getForm();
//获取表单项的内容，并形成JSON编码，以便后台读取
var strparas = Ext.encode(form.getValues());
//如果表单输入校验通过
if (form.isValid())
{
//以Ajax方式提交表单
form.submit({
//修改成功的回调函数
url: "/AjaxHandler/UpdateCustomers.ashx?jsonstr="+strparas,
clientValidation: true,
//params: strparas,
method:"GET",
success: function (form, action)
{
//处理函数
Ext.Msg.alert("提示", "保存成功！");
editWin.close(); //关闭或隐藏当前的编辑窗口
//重新加载数据
customerStore.load({ params: { start: 0, limt: 15 } });
}
});
}
}
},
{
text: "取消", handler: function ()
{
editWin.hide();
}
},
{ xtype: "tbfill" }
]
});
}
editWin.setVisible(true);
}
function getJson()
{
var CustomerID= Ext.getCmp("CustomerID").getValue();
var CompanyName= Ext.getCmp("CompanyName").getValue();
var ContactName= Ext.getCmp("ContactName").getValue();
var ContactTitle=Ext.getCmp("ContactTitle").getValue();
var Address=Ext.getCmp("Address").getValue();
var City= Ext.getCmp("City").getValue();
var Region=Ext.getCmp("Region").getValue();
var PostalCode=Ext.getCmp("PostalCode").getValue();
var Country=Ext.getCmp("Country").getValue();
var Phone = Ext.getCmp("Phone").getValue();
var Fax = Ext.getCmp("Fax").getValue();
var jsonObj = {
CustomerID: CustomerID,
CompanyName: CompanyName,
ContactName: ContactName,
ContactTitle: ContactTitle
};
return jsonObj;
}
//定义deleteFn删除函数
function deleteFn(grid,rowIndex,colIndex)
{
if(Ext.MessageBox.confirm("友情提示","删除后，数据将不可恢复，请慎重！"))
{
var rec = grid.getStore().getAt(rowIndex);
//Ajax方式发送请求
Ext.Ajax.request({
url: "/AjaxHandler/deleteCustomers.ashx",
params: {
//指定请求的参数
id:rec.get("CustomerID")
},
//指定服务器响应完成的回调函数
success: function (response)
{
//提示删除成功，并重新加载grid组件数据
var respText = Ext.decode(response.responseText);
Ext.Msg.alert("提示", "删除成功！，服务器返回为：" + respText);
customerStore.load({ params: { start: 0, limt: 15} });
},
failure: function (response)
{
var respText = Ext.decode(response.responseText);
Ext.Msg.alert("错误", respText.error);
}
});
}
}
//定义lookFn查看函数
function lookFn(grid,rowIndex,colIndex)
{
var rec = grid.getStore().getAt(rowIndex);
//创建form表单显示查看的信息
var lookWin = Ext.create("Ext.window.Window", {
title: "查看《" + rec.get("CustomerID") + "》详细信息",
width: 300,
height: 400,
// frame: true,
items: [
{
xtype:"form",
bodyPadding:10,
items:[
{
xtype: "textfield",
fieldLabel: "CustomerID",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("CustomerID")
}, {
xtype: "textfield",
fieldLabel: "CompanyName",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("CompanyName")
}, {
xtype: "textfield",
fieldLabel: "ContactName",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("ContactName")
}, {
xtype: "textfield",
fieldLabel: "ContactTitle",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("ContactTitle")
}, {
xtype: "textfield",
fieldLabel: "Address",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("Address")
}, {
xtype: "textfield",
fieldLabel: "City",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("City")
}, {
xtype: "textfield",
fieldLabel: "Region",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("Region")
}, {
xtype: "textfield",
fieldLabel: "PostalCode",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("PostalCode")
}, {
xtype: "textfield",
fieldLabel: "Country",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("Country")
}, {
xtype: "textfield",
fieldLabel: "Phone",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("Phone")
}, {
xtype: "textfield",
fieldLabel: "Fax",
readOnly: true,
readOnlyCls: "x-form-readonly",
value: rec.get("Fax")
}
]
}
]
});
lookWin.setVisible(true);
}
//
function AddCustomerFn()
{
//创建form表单显示查看的信息
var addkWin = Ext.create("Ext.window.Window", {
title: "新建数据",
width: 300,
height: 400,
resizable:false,
items: [
{
xtype: "form",
id: "addform",
width: "100%",
bodyPadding: 10,
items: [
{
xtype: "textfield",
fieldLabel: "CustomerID",
allowBlank: false,
name:"CustomerID"
}, {
xtype: "textfield",
fieldLabel: "CompanyName",
allowBlank: false,
name:"CompanyName"
}, {
xtype: "textfield",
fieldLabel: "ContactName",
allowBlank: false,
name:"ContactName"
}, {
xtype: "textfield",
fieldLabel: "ContactTitle",
allowBlank: false,
name:"ContactTitle"
}, {
xtype: "textfield",
fieldLabel: "Address",
allowBlank: false,
name:"Address"
}, {
xtype: "textfield",
fieldLabel: "City",
allowBlank: false,
name:"City"
}, {
xtype: "textfield",
fieldLabel: "Region",
allowBlank: false,
name:"Region"
}, {
xtype: "textfield",
fieldLabel: "PostalCode",
allowBlank: false,
name:"PostalCode"
}, {
xtype: "textfield",
fieldLabel: "Country",
allowBlank: false,
name:"Country"
}, {
xtype: "textfield",
fieldLabel: "Phone",
allowBlank: false,
name:"Phone"
}, {
xtype: "textfield",
fieldLabel: "Fax",
allowBlank: false,
name:"Fax"
},
]
}
],
//bbar: [
//{ xtype: "tbfill" },
//{
// text: "确定", align:"center", handler: function ()
// {
// debugger;
// var cc = addkWin.getComponent("addform");
// }
//},
//{
// text: "取消", handler: function ()
// {
// }
//}
//]
buttons: [
{
text: "确定", icon: "../icons/accept.png", scale: "small", handler: function ()
{
//获取表单
//var form = addkWin.getComponent("addform");【此种方式不能条用getForm()方法，但是可以用getValues()方法，郁闷……】
var form = addkWin.items.get(0).getForm();
if (form.isValid())
{
//Ajax方式发送请求
Ext.Ajax.request({
url: "/AjaxHandler/addCustomers.ashx",
params: {
jsonstr:Ext.encode(form.getValues())
},
success: function (response)
{
Ext.Msg.alert("提示", "新建成功！，服务器返回值为:" + response.responseText);
//关闭当前的Window组件，返回grid组件界面，并重新加载grid
addkWin.close();
//重新加载数据
customerStore.load({ params: { start: 0, limt: 15 } });
},
failure: function (response)
{
Ext.Msg.alert("提示", "新建失败！，服务器返回值为：" + response.responseText);
//关闭当前的Window组件，返回grid组件界面，并重新加载grid
addkWin.close();
//重新加载数据
customerStore.load({ params: { start: 0, limt: 15 } });
}
});
}
}
},
{
text: "取消", icon: "../icons/bullet_cross.png", scale: "small", handler: function ()
{
//直接关闭当前
//关闭当前的Window组件，返回grid组件界面，并重新加载grid
addkWin.close();
//重新加载数据
customerStore.load({ params: { start: 0, limt: 15 } });
}
},
{
text: "重置", icon: "../icons/arrow_redo.png", scale: "small", styel:"margin-rigth:250px;", handler: function ()
{
//获取当前的form对象
var form = addkWin.items.get(0).getForm();
//重置表单中的全部字段
form.reset();
}
}
]
});
addkWin.setVisible(true);
}
});using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Newtonsoft.Json;
namespace Ext.AjaxHandler
{
///
/// addCustomers 的摘要说明
///
public class addCustomers : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
NorthwindEntities db = new NorthwindEntities();
string json = context.Request["jsonstr"];
Customers customer = JsonConvert.DeserializeObject(json);
Customers addCustomers = new Customers()
{
Address = customer.Address,
City = customer.City,
CompanyName = customer.CompanyName,
ContactName = customer.ContactName,
ContactTitle = customer.ContactTitle,
Country = customer.Country,
CustomerID = customer.CustomerID,
Fax = customer.Fax,
Phone = customer.Phone,
PostalCode = customer.PostalCode,
Region = customer.Region
};
db.Customers.Add(addCustomers);
int result=db.SaveChanges();
context.Response.Write("{success:true,data:" + result + "}");
}
public bool IsReusable
{
get
{
return false;
}
}
}
} using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using Newtonsoft.Json;
namespace Ext.AjaxHandler
{
///
/// deleteCustomers 的摘要说明
///
public class deleteCustomers : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//context.Response.Write("Hello World");
string CustomerID = context.Request["id"];
NorthwindEntities db = new NorthwindEntities();
Customers customer= db.Customers.Single(c => c.CustomerID == CustomerID);
//由于Customers表和Orders\OrderDetails有关联[级联删除暂不操作]
//var orders = from o in db.Orders
// where o.CustomerID == CustomerID
// select o;
//foreach(var o in orders)
//{
// var orderdetails = from od in db.Order_Details
// where od.OrderID == o.OrderID
// select od;
//}
db.Customers.Remove(customer);
int result = db.SaveChanges();
context.Response.Write("{ success:true,result:" + result.ToString() + "}");
}
public bool IsReusable
{
get
{
return false;
}
}
}
} using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Newtonsoft.Json;
using System.IO;
using System.Text;
namespace Ext.AjaxHandler
{
///
/// UpdateCustomers 的摘要说明
///
public class UpdateCustomers : IHttpHandler
{
//http://www.cnblogs.com/lipan/archive/2011/12/07/2269815.html
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string json = context.Request["jsonstr"];
int result = 0;
//将获取的JSON字符串反序列化为Customers对象
Customers customer = JsonConvert.DeserializeObject(json);
using(NorthwindEntities db = new NorthwindEntities())
{
Customers c = db.Customers.FirstOrDefault(cc => cc.CustomerID == customer.CustomerID);
c.Address = customer.Address;
c.City = customer.City;
c.CompanyName = customer.CompanyName;
c.ContactName = customer.ContactName;
c.ContactTitle = customer.ContactTitle;
c.Country = customer.Country;
c.Fax = customer.Fax;
c.Phone = customer.Phone;
c.PostalCode = customer.PostalCode;
c.Region = customer.Region;
result= db.SaveChanges();
}
context.Response.Write("{success:true,data:" + result + "}");
}
public bool IsReusable
{
get
{
return false;
}
}
}
} using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Newtonsoft.Json;
using System.Data.SqlClient;
using System.Data;
namespace Ext.AjaxHandler
{
///
/// getCustomersByUSA 的摘要说明
///
public class getCustomersByUSA : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/json";
int start = Convert.ToInt32(context.Request.Params["start"]); //起始第一页
int limit = Convert.ToInt32(context.Request.Params["limit"]); //每页显示的记录数
int pageNum = Convert.ToInt32(context.Request.Params["page"].ToString()); //当前页
string result = string.Empty;
#region 传统的AdoNet方式
//string Sql = "Select Top " + limit + " * From Customers Where (CustomerID NOT IN(Select Top " + start + " CustomerID From Customers Order By CustomerID)) Order By CustomerID";
//DataTable dt = SqlHelper.ExecuteDataSet(SqlHelper.con_string, "Customers", CommandType.Text, Sql, null).Tables[0];
//int totalCount = getTotal();
//result = "{\"totalCount\":" + totalCount + ",\"data\":" + JsonConvert.SerializeObject(dt) + "}";
//context.Response.Write(result);
#endregion
#region Linq方式
NorthwindEntities db = new NorthwindEntities();
var totalCount = db.Customers.OrderBy(c => c.CustomerID).Count();
if ((pageNum-1) * limit < totalCount)
{
var query = db.Customers.OrderBy(c => c.CustomerID).Skip((pageNum-1) * limit).Take(limit);
List customerList = new List();
foreach (var item in query)
{
customerList.Add(new Customers()
{
Address = item.Address,
City = item.City,
Country = item.Country,
CompanyName = item.CompanyName,
ContactName = item.ContactName,
ContactTitle = item.ContactTitle,
CustomerID = item.CustomerID,
Fax = item.Fax,
Phone = item.Phone,
PostalCode = item.PostalCode,
Region = item.Region
});
}
result = "{\"totalCount\":" + totalCount + ",\"data\":" + JsonConvert.SerializeObject(customerList) + "}";
}
context.Response.Write(result);
#endregion
}
public int getTotal()
{
string Sql = "Select Count(*) As count From Customers";
DataSet ds = SqlHelper.ExecuteDataSet(SqlHelper.con_string, "Customers", CommandType.Text, Sql, null);
int total = int.Parse(ds.Tables[0].Rows[0]["count"].ToString());
return total;
}
public bool IsReusable
{
get
{
return false;
}
}
}
}