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asp.net mvc2 数据验证方法

news 来源：原创 2024/9/28 4:55:34

1.在MODEL定义一下attribute，通常包括：

[Required(ErrorMessage="stu no is not null")]
        [StringLength(10,ErrorMessage="length is invalid")]
        public global::System.String stuNo
        {
            get
            {
                return _stuNo;
            }
            set
            {
                if (_stuNo != value)
                {
                    OnstuNoChanging(value);
                    ReportPropertyChanging("stuNo");
                    _stuNo = StructuralObject.SetValidValue(value, false);
                    ReportPropertyChanged("stuNo");
                    OnstuNoChanged();
                }
            }
        }


 [Required(ErrorMessage="can not be null")]
        public global::System.String name
        {
            get
            {
                return _name;
            }
            set
            {
                OnnameChanging(value);
                ReportPropertyChanging("name");
                _name = StructuralObject.SetValidValue(value, true);
                ReportPropertyChanged("name");
                OnnameChanged();
            }
        }

Required:必须输入，不能为空
StringLength:字符串的长度不能大于设置的长度
Range:数字的可输入范围
RegularExpression:正则表达式匹配

2.VIEW代码：

<% using (Html.BeginForm()) {%>
       


        <fieldset>
            <legend>Fields</legend>
            
            <div class="editor-label">
                <%: Html.LabelFor(model => model.stuNo) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.stuNo) %>
                <%: Html.ValidationMessageFor(model => model.stuNo) %>
            </div>
            
            <div class="editor-label">
                <%: Html.LabelFor(model => model.name) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.name) %>
                <%: Html.ValidationMessageFor(model => model.name) %>
            </div>
            
            <div class="editor-label">
                <%: Html.LabelFor(model => model.classId) %>
            </div>
            <div class="editor-field">
                <%: Html.TextBoxFor(model => model.classId) %>
                <%: Html.ValidationMessageFor(model => model.classId) %>
            </div>
            
            <p>
                <input type="submit" value="Create" />
            </p>
        </fieldset>

3.controller判断一下：

[HttpPost]
        public ActionResult Create(Student s)
        {
            if (ModelState.IsValid)
            {
                svm.AddStudent(s);
                return Index();
            }
            else
            {
                return View("Create");
            }
        }