大家好，又见面了，我是全栈君
在前面写了两，但不知道如何完成，对比刚刚开始学这个，他们摸着石头过河，一步步。在最后两天DataGridCRUD融合在一起。因此份额。我希望像我这样谁是刚刚开始学习一些帮助。
直接主题酒吧。
它是说数据表，我建立了一个非常easy的表Rex_Test
ID | 自增序号 |
|---|---|
tName | 姓名 |
tEmail | 邮箱 |
前台代码：
Default.aspx
代码语言：javascript复制<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link rel="stylesheet" type="text/css" href="jquery-easyui-1.3.6/themes/default/easyui.css" />
<link rel="stylesheet" type="text/css" href="jquery-easyui-1.3.6/themes/icon.css" />
<link rel="stylesheet" type="text/css" href="demo.css" />
<script type="text/javascript" src="jquery-easyui-1.3.6/jquery.min.js"></script>
<script type="text/javascript" src="jquery-easyui-1.3.6/jquery.easyui.min.js"></script>
<script type="text/javascript">
function getQueryParams(queryParams)
{
var tkey = document.getElementById("tkey").value;
//alert(tkey);
//$("#quanxian").combobox("getValue");
queryParams.tkey = tkey;
return queryParams;
}
//添加查询參数，又一次载入表格
function reloadgrid()
{
//查询參数直接加入在queryParams中
var queryParams = $('#tt').datagrid('options').queryParams;
getQueryParams(queryParams);
$('#tt').datagrid('options').queryParams = queryParams;
$("#tt").datagrid('reload');
}
function add()
{
//清空内容
$('#fm').form('clear');
$('#dlg').dialog('open').dialog('setTitle', '加入邮箱');
document.getElementById("test").value = "add";
}
//改动
function editUser()
{
var row = $('#tt').datagrid('getSelected');
if (row == null) {
$.messager.alert("提示", "请选择要改动的行！", "info");
}
if (row) {
//获取要改动的字段
$('#tName').val(row.tName);
$('#tEmail').val(row.tEmail);
$('#dlg').dialog('open').dialog('setTitle', '改动邮箱');
document.getElementById("test").value = "modify";
$('#fm').form('load', row);
}
}
function removeUser()
{
var test = document.getElementById("test").value = "delete";
var row = $('#tt').datagrid('getSelected');
if (row == null) {
/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释
* $.messager.alert("提示", "请选择要删除的行！", "info"); } if (row) { $.messager.confirm('提示', '你确定要删除这条信息吗？', function (r) { if (r) { $('#fm').form('submit', { url: 'Handler5.ashx/ProcessRequest?ID=' row.ID "&test=" test, onSubmit: function () { //return $(this).form('validate'); }, success: function (result) { if (result.indexOf("T") == 0) { $('#dlg').dialog('close'); //$('#tt').datagrid('clearSelections'); //清空选中的行 $.messager.alert("提示", "恭喜您。信息删除成功！", "info"); //alert('恭喜您，信息删除成功！') // close the dialog $('#tt').datagrid('reload'); //$('#fm').form('submit'); } else { $.messager.alert("提示", "删除失败，请又一次操作！", "info"); //alert('加入失败，请又一次操作！') return; //$('#fm').form('submit'); } } }); } }) } } function saveUser() { var tName = document.getElementById("tName").value; var tEmail = document.getElementById("tEmail").value; //alert(tName "<br/>" tEmail); var test = document.getElementById("test").value; if (test == "add") { $('#fm').form('submit', { url: "Handler5.ashx?test=" test "&tName=" tName "&tEmail=" tEmail, onSubmit: function () { return $(this).form('validate'); }, success: function (result) { //alert(result); if (result.indexOf("T") == 0) { $('#dlg').dialog('close'); $.messager.alert("提示", "恭喜您，信息加入成功", "info"); //alert('恭喜您，信息加入成功！') // close the dialog $('#tt').datagrid('reload'); //$('#fm').form('submit'); } else { $.messager.alert("提示", "加入失败，请又一次操作！", "info"); return; //alert('加入失败，请又一次操作！') } } }); } else { var row = $('#tt').datagrid('getSelected'); if (row) { //获取要改动的字段 var ID = row.ID; //alert(ID); } $('#fm').form('submit', { url: "Handler5.ashx?test=" test "&ID=" ID "&tName=" tName "&tEmail=" tEmail, onSubmit: function () { return $(this).form('validate'); }, success: function (result) { if (result.indexOf("T") == 0) { $('#dlg').dialog('close'); //$('#tt').datagrid('clearSelections'); //清空选中的行 $.messager.alert("提示", "恭喜您，信息改动成功", "info"); //alert('恭喜您，信息加入成功。') // close the dialog $('#tt').datagrid('reload'); //$('#fm').form('submit'); } else { $.messager.alert("提示", "改动失败。请又一次操作。", "info"); return; //alert('加入失败。请又一次操作。') } } }); } } </script></head><body> <form id="fm" method="post"> <div> <%--表格显示区--%> <table id="tt" title="设置" class="easyui-datagrid" style="width: auto; height: 660px;" idField="ID" pagination="true" data-options="iconCls:'icon-save',rownumbers:true,url:'Handler5.ashx/ProcessRequest',pageSize:20, pageList:[20,30,40,50],method:'post',toolbar:'#tb',striped:true" fitcolumns="true"> <%--striped="true"--%> <%-- 表格标题--%> <thead> <tr> <th data-options="field:'ID',checkbox:true"> </th> <th data-options="field:'tName',width:100"> 姓名 </th> <th data-options="field:'tEmail',width:320,align:'center'"> 邮箱 </th> </tr> </thead> <%--表格内容--%> </table> <%--功能区--%> <div id="tb" style="padding: 5px; height: auto"> <%-- 包含加入，改动、删除 --%> <div style="margin-bottom: 5px"> <a href="javascript:void(0)" onclick="add()" class="easyui-linkbutton" data-options="iconCls:'icon-add',plain:true"></a> <a href="javascript:void(0)" onclick="editUser() " class="easyui-linkbutton" data-options="iconCls:'icon-edit',plain:true"></a> <a href="javascript:void(0)" onclick="removeUser()" class="easyui-linkbutton" data-options="iconCls:'icon-remove',plain:true"></a> </div> <%-- 查找信息 --%> <div> 姓名: <input id="tkey" /> <a href="#" class="easyui-linkbutton" data-options="iconCls:'icon-search'" onclick="reloadgrid()"> Search</a> </div> </div> <div id="dlg" class="easyui-dialog" style="width: 400px; height: auto; padding: 10px 20px" data-options="closed:true,buttons:'#dlg-buttons'"> <%--closed="true" buttons="#dlg-buttons"--%> <div class="ftitle"> 邮箱信息</div> <div class="fitem"> <label> 姓名：</label> <input id="tName" name="tName" class="easyui-validatebox" data-options="required:true" /> </div> <div class="fitem"> <label> 邮箱：</label> <input id="tEmail" name="tEmail" class="easyui-validatebox" data-options="required:true" /> <input name="Test" id="test" type="hidden" /> <input name="ID" id="ID" type="hidden" /> <input id="key" name="key" onkeydown="if(event.keyCode==13)reloadgrid()" type="hidden" /> </div> </div> <div id="dlg-buttons"> <a href="#" class="easyui-linkbutton" data-options="iconCls:'icon-ok'" onclick="saveUser()"> 保存</a> <a href="#" class="easyui-linkbutton" data-options="iconCls:'icon-cancel'" onclick="javascript:$('#dlg').dialog('close')">关闭</a> </div> </div> </form></body></html>
*/然后这里就是一般处理程序
Handler5.ashx
代码语言：javascript复制<%@ WebHandler Language="C#" Class="Handler5" %>
using System;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Text;
public class Handler5 : IHttpHandler {
public void ProcessRequest(HttpContext context)
{
string command = context.Request.QueryString["test"];//前台传的标示值
if (command == "add")
{//调用加入方法
Add(context);
}
else if (command == "modify")
{//调用改动方法
Modify(context);
}
else if (command == "delete")
{
Delete(context);
}
else
{
Query(context);
}
//Query(context);
}
public bool IsReusable
{
get
{
return false;
}
}
public void Add(HttpContext context)
{
context.Response.ContentType = "text/plain";
string xx = string.Empty;
string tname = context.Request.QueryString["tName"];
string temail = context.Request.QueryString["tEmail"];
SqlHelp sqla = new SqlHelp();
string sqlString = "insert into Rex_Test(tName,tEmail) values('" tname "','" temail "')";
bool aa= sqla.ExecuteNonQuery(sqlString);
sqla.SqlClose();
if (aa)
{
xx = "True";
}
else
{
xx="False";
}
context.Response.Write(xx);
}
public void Modify(HttpContext context)
{
context.Response.ContentType = "text/plain";
string yy = string.Empty;
string id = context.Request.QueryString["ID"];
string tname = context.Request.QueryString["tName"];
string temail = context.Request.QueryString["tEmail"];
SqlHelp sqlb = new SqlHelp();
string sqlString = "update Rex_Test set tName='" tname "',tEmail='" temail "' where ID='" id "'";
bool bb= sqlb.ExecuteNonQuery(sqlString);
sqlb.SqlClose();
if (bb)
{
yy = "True";
}
else
{
yy = "False";
}
context.Response.Write(yy);
}
public void Delete(HttpContext context)
{
context.Response.ContentType = "text/plain";
string zz = string.Empty;
string id=context.Request.QueryString["ID"];
SqlHelp sqlc = new SqlHelp();
string strfacc = "delete from Rex_Test where ID='" id "'";
sqlc.ExecuteNonQuery(strfacc);
sqlc.SqlClose();
context.Response.Write("True");
}
/// <summary>
/// 查询记录
/// </summary>
/// <param name="context"></param>
public void Query(HttpContext context)
{
context.Response.ContentType = "text/plain";
//===============================================================
string tkey;
tkey = "";
//获取前台传来的值
if (null != context.Request.QueryString["tkey"])
{//获取前台传来的值
tkey = context.Request.QueryString["tkey"].ToString().Trim();
}
//================================================================
//获取分页和排序信息：页大小，页码，排序方式。排序字段
int pageRows, page;
pageRows = 10;
page = 1;
string order, sort, oderby; order = sort = oderby = "";
if (null != context.Request.QueryString["rows"])
{
pageRows = int.Parse(context.Request.QueryString["rows"].ToString().Trim());
}
if (null != context.Request.QueryString["page"])
{
page = int.Parse(context.Request.QueryString["page"].ToString().Trim());
}
if (null != context.Request.QueryString["sort"])
{
order = context.Request.QueryString["sort"].ToString().Trim();
}
if (null != context.Request.QueryString["order"])
{
sort = context.Request.QueryString["order"].ToString().Trim();
}
//===================================================================
//组合查询语句：条件 排序
StringBuilder strWhere = new StringBuilder();
if (tkey != "")
{
strWhere.AppendFormat("tName like '%{0}%' and ", tkey);
}
//删除多余的and
int startindex = strWhere.ToString().LastIndexOf("and");//获取最后一个and的位置
if (startindex >= 0)
{
strWhere.Remove(startindex, 3);//删除多余的andkeyword
}
if (sort != "" && order != "")
{
//strWhere.AppendFormat(" order by {0} {1}", sort, order);//加入排序
oderby = order " " sort;
}
//DataSet ds = Bnotice.GetList(strWhere.ToString()); //调用不分页的getlist
//调用分页的GetList方法
DataSet ds = GetListByPage(strWhere.ToString(), oderby, (page - 1) * pageRows 1, page * pageRows);
int count = GetRecordCount(strWhere.ToString());//获取条数
string strJson = ToJson.Dataset2Json(ds, count);//DataSet数据转化为Json数据
context.Response.Write(strJson);//返回给前台页面
context.Response.End();
}
public int GetRecordCount(string strWhere)
{
SqlHelp sqlx = new SqlHelp();
StringBuilder strSql = new StringBuilder();
strSql.Append("select count(1) FROM Rex_Test");
if (strWhere.Trim() != "")
{
strSql.Append(" where " strWhere);
}
int obj = sqlx.ReturnCount(strSql.ToString());
sqlx.SqlClose();
if (obj<=0)
{
return 0;
}
else
{
return Convert.ToInt32(obj);
}
}
/// <summary>
/// 分页获取数据列表
/// </summary>
public DataSet GetListByPage(string strWhere, string orderby, int startIndex, int endIndex)
{
SqlHelp sqly = new SqlHelp();
try
{
StringBuilder strSql = new StringBuilder();
strSql.Append("SELECT * FROM ( ");
strSql.Append(" SELECT ROW_NUMBER() OVER (");
if (!string.IsNullOrEmpty(orderby.Trim()))
{
strSql.Append("order by T." orderby);
}
else
{
strSql.Append("order by ID asc");
}
strSql.Append(")AS Row, T.* from Rex_Test T ");
if (!string.IsNullOrEmpty(strWhere.Trim()))
{
strSql.Append(" WHERE " strWhere);
}
strSql.Append(" ) TT");
strSql.AppendFormat(" WHERE TT.Row between {0} and {1}", startIndex, endIndex);
return sqly.GetDataSet(strSql.ToString());
}
finally { sqly.SqlClose(); }
}
}最有另一个Json转换类
ToJson.cs
代码语言：javascript复制using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.IO;
/// <summary>
///ToJson 的摘要说明
/// </summary>
public class ToJson
{
/// <summary>
/// DataSet转换成Json格式
/// </summary>
/// <paramname="ds">DataSet</param>
///<returns></returns>
public static string Dataset2Json(DataSet ds, int total = -1)
{
StringBuilder json = new StringBuilder();
foreach (DataTable dt in ds.Tables)
{
//{"total":5,"rows":[
json.Append("{"total":");
if (total == -1)
{
json.Append(dt.Rows.Count);
}
else
{
json.Append(total);
}
json.Append(","rows":[");
json.Append(DataTable2Json(dt));
json.Append("]}");
}
return json.ToString();
}
/// <summary>
/// dataTable转换成Json格式
/// </summary>
/// <paramname="dt"></param>
///<returns></returns>
public static string DataTable2Json(DataTable dt)
{
StringBuilder jsonBuilder = new StringBuilder();
for (int i = 0; i <dt.Rows.Count; i )
{
jsonBuilder.Append("{");
for (int j = 0; j <dt.Columns.Count; j )
{
jsonBuilder.Append(""");
jsonBuilder.Append(dt.Columns[j].ColumnName);
jsonBuilder.Append("":"");
jsonBuilder.Append(dt.Rows[i][j].ToString());
jsonBuilder.Append("",");
}
if (dt.Columns.Count > 0)
{
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
}
jsonBuilder.Append("},");
}
if (dt.Rows.Count > 0)
{
jsonBuilder.Remove(jsonBuilder.Length - 1, 1);
}
return jsonBuilder.ToString();
}
}通过以上几步，基本上能够实现DataGrid的增删改查，其他功能还在学习中。请多多不吝赐教。
哦，对了，我发现这个Jqurey EasyUI DataGrid的一些功能，比方刷新、分页这些在IE11下。不怎么兼容样。假设有知道解决方法的朋友，希望能够留言。给大家分享一下，谢了。
近期有点时间。又来研究了一下这个问题。最终找到了问题所在，原来是method:’get’这里须要改为method:’post’，
这样子改动后。每次操作完毕又一次绑定数据后，就会又一次刷新了。
它似乎还有意向啊。
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发布者：全栈程序员栈长，转载请注明出处：https://javaforall.cn/116819.html原文链接：https://javaforall.cn
