/// <summary>
/// 构建表单组的html
/// 包含
/// 名称，控件，验证文本
/// 结构
/// div.form-group
/// label.control-label
/// div.form-controls
/// 控件
/// span.field-validation-valid
/// </summary>
/// <param name="field">表单字段</param>
/// <param name="htmlAttributes">添加到元素的html属性</param>
/// <param name="control">控件</param>
/// <returns></returns>
public virtual string FormGroupHtml(
FormField field, Dictionary<string, string> htmlAttributes, string control) {
var html = new StringBuilder();
html.AppendLine("<div class='form-group'>");
html.AppendLine(" <label class='control-label'>");
html.AppendLine(" " + HttpUtility.HtmlEncode(new T(field.Attribute.Name)));
if (htmlAttributes.ContainsKey(Required.Key)) {
html.AppendLine(" <em>*</em>");
}
html.AppendLine(" </label>");
html.AppendLine(" <div class='form-controls'>");
html.AppendLine(" " + control);
html.AppendLine(" <span class='field-validation-valid' data-valmsg-for='" +
HttpUtility.HtmlAttributeEncode(field.Attribute.Name) +
"' data-valmsg-replace='true'></span>");
html.AppendLine(" </div>");
html.AppendLine("</div>");
return html.ToString();
}
/// <summary>
/// 初始化表单构建器
/// </summary>
public ModelFormBuilder(FormBuilder form = null) {
Form = form ?? Application.Ioc.Resolve<FormBuilder>();
var type = GetType();
// 设置表单属性
var formAttribute = type.GetAttribute<FormAttribute>();
if (formAttribute != null) {
Form.Attribute = formAttribute;
}
// 添加成员和验证属性
Form.Fields.Clear();
FieldToMember = new Dictionary<FormField, MemberInfo>();
var members = type.GetProperties().OfType<MemberInfo>().Concat(type.GetFields());
foreach (var member in members) {
var fieldAttribute = member.GetAttribute<FormFieldAttribute>();
if (fieldAttribute != null) {
var field = new FormField(fieldAttribute);
field.ValidationAttributes.AddRange(member.GetAttributes<ValidationAttribute>());
Form.Fields.Add(field);
FieldToMember[field] = member;
}
}
}
/// <summary>
/// 描画表单字段
/// </summary>
/// <param name="html">html构建器</param>
/// <param name="field">表单字段</param>
protected virtual void RenderFormField(HtmlTextWriter html, FormField field) {
// 根据验证器添加html属性
var htmlAttributes = new Dictionary<string, string>();
foreach (var validatorAttribute in field.ValidationAttributes) {
var validator = Application.Ioc.Resolve<IFormFieldValidator>(serviceKey: validatorAttribute.GetType());
validator.AddHtmlAttributes(field, validatorAttribute, htmlAttributes);
}
// 构建表单字段的html并写入到html构建器
var fieldHandler = Application.Ioc.Resolve<IFormFieldHandler>(serviceKey: field.Attribute.GetType());
html.WriteLine(fieldHandler.Build(field, htmlAttributes));
}
/// <summary>
/// 描画csrf校验值
/// </summary>
/// <param name="html">html构建器</param>
protected virtual void RenderCsrfToken(HtmlTextWriter html) {
// 不需要描画时直接返回
if (!Attribute.EnableCsrfToken) {
return;
}
// 获取cookies传入的csrf校验值，不存在时设置
var token = HttpContextUtils.GetCookie(CsrfTokenKey);
if (string.IsNullOrEmpty(token)) {
token = HttpServerUtility.UrlTokenEncode(RandomUtils.SystemRandomBytes(20));
HttpContextUtils.PutCookie(CsrfTokenKey, token);
}
// 添加到表单中
var field = new FormField(new HiddenFieldAttribute(CsrfTokenFieldName));
field.Value = token;
RenderFormField(html, field);
}
