我正在使用Google Maps Api v3做一个项目.我想要提供一个包含餐馆的点的完整列表,并希望以某种方式允许用户选择餐馆类型,显示和隐藏类型.
这可以使用图层,或者更正确,我清除所有点并再次将它们上传到地图上,这可能会使它变慢.
TKS
有下面的类,并尝试在数据库中查找记录返回错误.使用C#,MVC 4,Entity Framework 4和SQL Server 2012数据库.
Unable to determine the principal end of an association between the types 'FlexApp.Models.Model.Usuario' and 'FlexApp.Models.Model.Usuario'.
The principal end of this association must be explicitly configured using either the relationship fluent API or data annotations.
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public class Usuario
{
[Key]
public int UsuarioID { get; set; }
public string Nome { get; set; }
public int UsuCad { get; set; }
public int UsuAlt { get; set; }
[ForeignKey("UsuCad")]
public virtual Usuario UsuarioCad …Run Code Online (Sandbox Code Playgroud) 我创建了表TEST,用于<>数据库Oralce中的use运算符.当您运行以下命令时,我发现奇怪的是不返回任何记录.
为什么不退回任何记录?在SQL Server和Firebird数据库中,该命令有效.
select * from TEST where Adress <> '';
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http://sqlfiddle.com/#!4/7e89f/2
create table TEST(
ID int not null,
Name varchar2(100) not null,
Adress varchar2(100)
);
alter table TEST add constraint TEST_pk primary key (ID);
insert into TEST values (1, 'Emily', null);
insert into TEST values (2, 'Michael', 'Test');
insert into TEST values (3, 'Daniel', 'Test');
insert into TEST values (4, 'Alexis', 'Test');
Run Code Online (Sandbox Code Playgroud) 我正在使用插件"DataTables",我想逐行添加图像,当用户点击时,调用另一个网址.
我按照www.datatables.net的例子,但是给出了以下错误:
DataTables warning(table id ='myDataTable'):从第0行的数据源请求未知参数'4'.
记录显示在屏幕上
<h2>Index</h2>
<script type="text/javascript">
$(document).ready(function () {
var oTable = $('#myDataTable').dataTable({
"bServerSide": true,
"sAjaxSource": "AjaxHandler",
"bProcessing": true,
"sPaginationType": "full_numbers",
"aoColumns": [
{ "mDataProp": "ID", "bSortable": false },
{ "mDataProp": "Nome", "sTitle": "Identificação do produto" },
{ "mDataProp": "Address", "sTitle": "Descrição do produto" },
{ "mDataProp": "Town" },
{ "fnRender": function (o) {return '<a href=/Produto/Detalhar/' + o.aData[0] + '>' + 'More' + '</a>';}}
],
});
});
</script>
<table id="myDataTable" class="display">
<thead>
<tr>
<th>ID</th>
<th>Company name</th> …Run Code Online (Sandbox Code Playgroud) 我需要使用BDE将参数传递给Delphi中的SQL以使用"in",如下所示:
select * from customers where id in (:p_in)
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我需要通过:p_in客户列表.但Query.ParamByName.('p_in').AsString: = '1, 2,3 ',它并没有用..将不得不制作一个阵列?或者由AsVariant传递?