前言
最近在学习Asp.net MVC Razor,在使用中遇到了不少的问题,所以想着总结下来,没有经验的童鞋就是这样磕磕碰碰出来的经验。话不多说,来一起看看详细的介绍:
一、Datatype的错误提示消息无法自定义
这也许是Asp.net MVC的一个Bug。ViewModel中定义了DataType为Date字段:
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[Required(ErrorMessage = "Birthday must be input!" )]
[DataType(DataType.Date, ErrorMessage = "Please enter a date like(2017-07-19)." )]
public DateTime BirthDay { get ; set ; }
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Razor生成的HTML如下:
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<input name= "BirthDay" class = "form-control" id= "BirthDay" type= "text" value= "" data-val-required= "Birthday must be input!" data-val= "true" data-val-date= "字段 BirthDay 必须是日期。" >
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Required的错误消息和定义的一样,而DataType的消息却没有??既然DataType有自定义消息的公开属性为啥不起作用?如果有知道的欢迎留言。
解决方法:
通过Javascript在页面Load的时候替换掉原来的消息。
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$( "#txtDesignatedDate" ).attr( 'data-val-date' , 'Please enter a date like(2017/1/1)' );
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二、d-MMM-yy格式的英文日期在IE中验证出错,而在Chrome中没问题
Razor模型绑定设置如下:
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@Html.LabelFor(m => m.BirthDay, new { @class = "col-md-2 control-label" })
@Html.TextBoxFor(m => m.BirthDay, "{0:d-MMM-yy}", new { @class = "form-control" })
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Edge测试情况:显示日期不对的错误消息。
Chrome测试情况:居然没有错误提示!!
如果是英文以外同样格式的日期,都会显示日期不对错误消息。这到底怎么回事?
官网(http://jqueryvalidation.org/date-method/)其实也有说明:
翻看JS代码:
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// http://docs.jquery.com/Plugins/Validation/Methods/date
date: function( value, element ) {
return this .optional(element) || !/Invalid|NaN/.test( new Date(value).toString());
},
// http://docs.jquery.com/Plugins/Validation/Methods/dateISO
dateISO: function( value, element ) {
return this .optional(element) || /^\d{4}[\/\-]\d{1,2}[\/\-]\d{1,2}$/.test(value);
},
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dateISO也只支持yyyy-MM-dd 或者yyyy/MM/dd格式的验证。没办法只能重写一个验证方法覆盖原来的。
解决方法:
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( function ($) {
$.validator.methods.date = function (value, element) {
return this .optional(element) || DateCheck(value);
}
}(jQuery));
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自定义一个DateCheck函数就可以了。
三、DropDownList设置默认选择项偶尔会无效
Action端设置:
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return View( new RegisterViewModel { BirthDay = DateTime.Now, BirthCity = City.Shanghai });
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View端设置:
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@Html.DropDownListFor(m => m.BirthCity, new SelectListItem[] {
new SelectListItem{ Text= "Jiangxi" ,Value= "1" },
new SelectListItem{ Text= "Beijing" ,Value= "2" },
new SelectListItem{ Text= "Shanghai" ,Value= "3" },
new SelectListItem{ Text= "ShengZhen" ,Value= "4" },
}, new { @ class = "form-control" })
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偶尔这样的设置无法选择Action中设置的选项,如果有知道原因的欢迎留言。
解决方法:用SelectList替代SelectItem列表。
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@Html.DropDownListFor(m => m.BirthCity, new SelectList( new SelectListItem[] {
new SelectListItem{ Text= "Jiangxi" ,Value= "1" },
new SelectListItem{ Text= "Beijing" ,Value= "2" },
new SelectListItem{ Text= "Shanghai" ,Value= "3" },
new SelectListItem{ Text= "ShengZhen" ,Value= "4" },
}, "Value" , "Text" , Model.BirthCity), new { @ class = "form-control" })
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四、密码输入自动提示在Chrome中无法禁止
autocomplete = "off"
在Chrome58以后都无效了。这个是浏览器的问题没办法了。
五、Disabled的控件值不上传给服务器
解决方法:通过Javascript在submit之前将控件的Disabled属性删除,submit完成之后再复原Disabled属性。
六、Html.HiddenFor()的控件值不更新
由于HiddenFor默认先使用ModelState的数据,所以在ModelState验证失败的情况下,重新加载画面可能HiddenFor的控件数据是旧的。
解决方法:
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ModelState.Clear();
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七、List与Dictionary的数据Razor如何绑定
ViewModel属性:
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public List ListTest { get ; set ; }
public Dictionary> DicTest { get ; set ; }
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View端绑定:
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@ for ( int i = 0; i < Model.ListTest.Count; i++)
{
@Html.TextBoxFor(m => m.ListTest[i].Name, new { @ class = "form-control" })
@Html.TextBoxFor(m => m.ListTest[i].Phone, new { @ class = "form-control" })
}
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@ for ( int i = 0; i < Model.DicTest.Count; i++)
{
string key = Model.DicTest.Keys.ElementAt(i);
< input type= "hidden" name= "DicTest[@i].Key" value= "@key" />
for ( int j = 0; j < Model.DicTest[key].Count; j++)
{
@Html.TextBox($ "DicTest[{i}].Value[{j}].Name" , Model.DicTest[key][j].Name, new { @ class = "form-control" })
@Html.TextBox($ "DicTest[{i}].Value[{j}].Phone" , Model.DicTest[key][j].Phone, new { @ class = "form-control" })
}
}
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生成的Html如下:
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< input name = "ListTest[0].Name" class = "form-control" id = "ListTest_0__Name" type = "text" value = "lxb1" >
< input name = "ListTest[0].Phone" class = "form-control" id = "ListTest_0__Phone" type = "text" value = "123" >
< input name = "ListTest[1].Name" class = "form-control" id = "ListTest_1__Name" type = "text" value = "lxb2" >
< input name = "ListTest[1].Phone" class = "form-control" id = "ListTest_1__Phone" type = "text" value = "1234" >
< input name = "ListTest[2].Name" class = "form-control" id = "ListTest_2__Name" type = "text" value = "lxb3" >
< input name = "ListTest[2].Phone" class = "form-control" id = "ListTest_2__Phone" type = "text" value = "12345" >
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< input name = "DicTest[0].Key" type = "hidden" value = "JX" >
< input name = "DicTest[0].Value[0].Name" class = "form-control" id = "DicTest_0__Value_0__Name" type = "text" value = "lxb1" >
< input name = "DicTest[0].Value[0].Phone" class = "form-control" id = "DicTest_0__Value_0__Phone" type = "text" value = "123" >
< input name = "DicTest[0].Value[1].Name" class = "form-control" id = "DicTest_0__Value_1__Name" type = "text" value = "lxb2" >
< input name = "DicTest[0].Value[1].Phone" class = "form-control" id = "DicTest_0__Value_1__Phone" type = "text" value = "1234" >
< input name = "DicTest[1].Key" type = "hidden" value = "SZ" >
< input name = "DicTest[1].Value[0].Name" class = "form-control" id = "DicTest_1__Value_0__Name" type = "text" value = "lxb3" >
< input name = "DicTest[1].Value[0].Phone" class = "form-control" id = "DicTest_1__Value_0__Phone" type = "text" value = "12345" >
< input name = "DicTest[1].Value[1].Name" class = "form-control" id = "DicTest_1__Value_1__Name" type = "text" value = "lxb4" >
< input id = "DicTest_1__Value_1__Phone" class = "form-control" value = "123456" name = "DicTest[1].Value[1].Phone" >
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其中控件的name很重要。
List: viewmodelpropertyname[index].modelpropertyname
格式。
Dictionary:key设置为viewmodelpropertyname[index].Key
,Value设置为viewmodelpropertyname[index].Value
八、尽量多使用EditorFor
比如将第7点的DicTest使用EditorFor。首先需要在Shared或者Controller自身文件夹下创建EditorTemplates文件夹,然后在EditorTemplates文件夹中添加分部页。代码如下:
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@ using MVCDemo.Models;
@model List
@ for ( int i = 0; i < Model.Count; i++)
{
@Html.TextBoxFor(m => m[i].Name, new { @ class = "form-control" })
@Html.TextBoxFor(m => m[i].Phone, new { @ class = "form-control" })
}
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调用页面设置:
List的时候
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@Html.EditorFor(m => m.ListTest, "_PartialPerson" , $ "ListTest" )
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Dictionary的时候
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@ for ( int i = 0; i < Model.DicTest.Count; i++)
{
string key = Model.DicTest.Keys.ElementAt(i);
<input type= "hidden" name= "DicTest[@i].Key" value= "@key" />
@Html.EditorFor(m => m.DicTest[key], "_PartialPerson" , $ "DicTest[{i}].Value" )
}
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生成的HTML:
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< div class = "col-md-10" >
< input name = "ListTest[0].Name" class = "form-control" id = "ListTest_0__Name" type = "text" value = "lxb1" >
< input name = "ListTest[0].Phone" class = "form-control" id = "ListTest_0__Phone" type = "text" value = "123" >
< input name = "ListTest[1].Name" class = "form-control" id = "ListTest_1__Name" type = "text" value = "lxb2" >
< input name = "ListTest[1].Phone" class = "form-control" id = "ListTest_1__Phone" type = "text" value = "1234" >
< input name = "ListTest[2].Name" class = "form-control" id = "ListTest_2__Name" type = "text" value = "lxb3" >
< input name = "ListTest[2].Phone" class = "form-control" id = "ListTest_2__Phone" type = "text" value = "12345" >
</ div >
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< div class = "col-md-10" >
< input name = "DicTest[0].Key" type = "hidden" value = "JX" >
< input name = "DicTest[0].Value[0].Name" class = "form-control" id = "DicTest_0__Value_0__Name" type = "text" value = "lxb1" >
< input name = "DicTest[0].Value[0].Phone" class = "form-control" id = "DicTest_0__Value_0__Phone" type = "text" value = "123" >
< input name = "DicTest[0].Value[1].Name" class = "form-control" id = "DicTest_0__Value_1__Name" type = "text" value = "lxb2" >
< input name = "DicTest[0].Value[1].Phone" class = "form-control" id = "DicTest_0__Value_1__Phone" type = "text" value = "1234" >
< input name = "DicTest[1].Key" type = "hidden" value = "SZ" >
< input name = "DicTest[1].Value[0].Name" class = "form-control" id = "DicTest_1__Value_0__Name" type = "text" value = "lxb3" >
< input name = "DicTest[1].Value[0].Phone" class = "form-control" id = "DicTest_1__Value_0__Phone" type = "text" value = "12345" >
< input name = "DicTest[1].Value[1].Name" class = "form-control" id = "DicTest_1__Value_1__Name" type = "text" value = "lxb4" >
< input name = "DicTest[1].Value[1].Phone" class = "form-control" id = "DicTest_1__Value_1__Phone" type = "text" value = "123456" >
</ div >
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这样就简化了不少,也到达了重用。
总结
以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流,谢谢大家对服务器之家的支持。