我该如何优化这段代码?我不喜欢有案例陈述,有没有办法可以改进这段代码?
protected void ddlFilterResultBy_SelectedIndexChanged(object sender, EventArgs e)
{
string selVal = ddlFilterResultBy.SelectedValue.ToString().ToLower();
switch (selVal)
{
case "date":
pnlDate.Visible = true;
pnlSubject.Visible = false;
pnlofficer.Visible = false;
pnlCIA.Visible = false;
pnlMedia.Visible = false;
pnlStatus.Visible = false;
break;
case "subject":
pnlDate.Visible = false;
pnlSubject.Visible = true;
pnlofficer.Visible = false;
pnlCIA.Visible = false;
pnlMedia.Visible = false;
pnlStatus.Visible = false;
break;
case "officer":
pnlDate.Visible = false;
pnlSubject.Visible = false;
pnlofficer.Visible = true;
pnlCIA.Visible = false;
pnlMedia.Visible = false;
pnlStatus.Visible = false;
break;
case "status": …Run Code Online (Sandbox Code Playgroud) 更新建议后,我仍然收到错误
和.SingleOrDefault()或试过FirstOrDefault()

我需要检索StringLength注释值,这是我的代码,但我收到以下错误.
我试图从这里实现几乎相同的代码,但得到错误:
序列不包含任何元素
public static class DataAnnotation
{
public static int GetMaxLengthFromStringLengthAttribute(Type modelClass, string propertyName)
{
int maxLength = 0;
var attribute = modelClass.GetProperties()
.Where(p => p.Name == propertyName)
.Single()
.GetCustomAttributes(typeof(StringLengthAttribute), true)
.Single() as StringLengthAttribute;
if (attribute != null)
maxLength = attribute.MaximumLength;
return 0;
}
}
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//调用:
int length = DataAnnotation.GetMaxLengthFromStringLengthAttribute(typeof(EmployeeViewModel), "Name");
public class EmployeeViewModel
{
[StringLength(20, ErrorMessage = "Name cannot be longer than 20 characters.")]
public string Name{ get; set; …Run Code Online (Sandbox Code Playgroud) 我旁边有一个文本框和一个日期选择器,我使用的是asp.net,用户可以输入日期,也可以从datepicker中选择日期.
如何验证日期输入是否正确?
<script type="text/javascript">
$(document).ready(function () {
$('#<%=StartDate.ClientID%>').datepicker({ showOn: 'button',
buttonImage: '../images/Calendar.png',
buttonImageOnly: true, onSelect: function () { },
onClose: function () { $(this).focus(); }
});
});
</script>
Run Code Online (Sandbox Code Playgroud) 这个错误是什么意思?,我一直得到这个错误,它用来工作正常,它刚刚开始抛出这个错误....任何帮助?
img1.ImageUrl = ConfigurationManager.AppSettings.Get("Url").Replace("###", randomString)
+ Server.UrlEncode(((System.Web.UI.MobileControls.Form)Page.FindControl("mobileForm")).Title);
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MyProject.DLL中发生了'System.NullReferenceException'类型的异常,但未在用户代码中处理
附加信息:未将对象引用设置为对象的实例.
如何在input元素中获取Title的属性
<input type="image" title="Previous Page">
<input type="image" title="First Page">
<input type="image" title="Next Page">
<input type="image" title="Last Page">
Run Code Online (Sandbox Code Playgroud) 编辑:
好吧,我已经通过jquery小部件检查了代码及其渲染.
结束
我试图将光标移动到<a \>,但问题是,直到我在所选图像上物理移动鼠标指针时才会渲染元素.
如何移动鼠标悬停<a \>以选择/单击?
FF version 20
Selenium WebDriver version: 2.31.2.0
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目前的代码
Actions actions = new Actions(driver);
int locationX = Convert.ToInt32(ratingElementDiv[i].Location.X);
int locationY = ratingElementDiv[i].Location.Y;
actions.MoveToElement(WaitForElement(By.CssSelector(starElement)), locationX, locationY).Click().Perform();
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我没有看到任何行动发生...任何帮助?
public class ClientViewModel
{
[Required(ErrorMessage = "The Client Code field is required.")]
public string ClientCode { get; set; }
[Required(ErrorMessage = "The Company Legal Name field is required.")]
public string CompanyLegalName { get; set; }
public string Notes { get; set; }
public string Address { get; set; }
public string City { get; set; }
public string State { get; set; }
public string Zip { get; set; }
public Nullable<DateTime> ScheduledDate { get; set; }
public Nullable<decimal> AmountDiscount …Run Code Online (Sandbox Code Playgroud) 我刚在Windows上安装了一个新的postgresql 9.5服务器
我正在尝试恢复数据库时出现错误消息.
pg_restore:[archiver(db)] INITIALIZING时出错:pg_restore:[archiver(db)]无法执行查询:错误:无法识别的配置参数"row_security"命令为:SET row_security = off;
是什么导致这个?
当我进一步检查调试时,我发现它确实传递了json数据,这里是调试的屏幕截图.
<html>
<head>
<link
<script data-require="jquery@*" data-semver="2.0.3" src="http://code.jquery.com/jquery-2.0.3.min.js"></script>
<script src="https://cdn.datatables.net/1.10.4/js/jquery.dataTables.js" data-semver="1.9.4" data-require="datatables@*"></script>
<script data-require="bootstrap@*" data-semver="3.1.1" src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="style.css" />
<script src="app.js"></script>
</head>
<body>
<table id="myDataTable" class="table table-striped table-bordered">
<thead>
<tr>
<th>primaryGenreName</th>
<th>country</th>
</tr>
</thead>
<tbody>
</tbody>
</body>
</html>
Run Code Online (Sandbox Code Playgroud) 这是什么意思我正在尝试恢复我的 postgresql 数据库,这是我得到的,但我没有看到它恢复表/数据/
C:\Program Files\PostgreSQL\9.4\bin\pg_restore.exe --host 123-97.compute-1.amazonaws.com --port 5432 --username "username" --dbname "mydb" --no-password --section pre-data --section data --section post-data --schema public --verbose "C:\db\employee.backup"
pg_restore:连接到数据库进行恢复 pg_restore:隐含的仅数据恢复
进程返回退出代码 0。
我使用的是 Windows 8.1
c# ×4
asp.net ×2
asp.net-mvc ×2
jquery ×2
postgresql ×2
webdriver ×2
.net ×1
automapper ×1
datatables ×1
datepicker ×1
javascript ×1
pgadmin ×1