Asp.NETCore2复杂标记帮助程序
我是Asp.NETCore的新手,在标记帮助程序方面遇到了问题 我正在尝试为两种场景创建标记帮助器: -输入组 -复选框 当我从asp for标记开始时,我构建其他标记没有问题,但我不知道如何构建“智能”标记,例如带有asp for字段的输入标记和所有验证 以下是我试图构建的内容: 输入组Asp.NETCore2复杂标记帮助程序,asp.net,asp.net-core,asp.net-core-tag-helpers,Asp.net,Asp.net Core,Asp.net Core Tag Helpers,我是Asp.NETCore的新手,在标记帮助程序方面遇到了问题 我正在尝试为两种场景创建标记帮助器: -输入组 -复选框 当我从asp for标记开始时,我构建其他标记没有问题,但我不知道如何构建“智能”标记,例如带有asp for字段的输入标记和所有验证 以下是我试图构建的内容: 输入组 <div class="input-group"> <input class="form-control" placeholder="Search" type="text" data
<div class="input-group">
<input class="form-control" placeholder="Search" type="text" data-val="true" data-val-maxlength="Max value" data-val-maxlength-max="5" id="SearchText" name="SearchText" value="" maxlength="5">
<span class="input-group-append"><button class="btn btn-light" id="myButtonId" type="button">Search</button></span>
</div>
我想要的是这样的:
<input-tag asp-for="SearchText" class="form-control" placeholder="Buscar" button="myButtonId" append="true" />
因此,只有一个标记可以生成所有代码,但我不知道如何在标记帮助器中生成“TextBoxFor”
复选框
chechbox也有同样的问题,我只需要从一个标记创建它:
<div class="custom-control custom-control-primary custom-checkbox">
<input class="custom-control-input" data-val="true" data-val-required="The SearchActive field is required." id="SearchActive" name="SearchActive" type="checkbox" value="true">
<label class="custom-control-label" for="SearchActive">Solo activos</label>
<input name="SearchActive" type="hidden" value="false">
</div>
独唱
感谢您帮助…根据当前模型计算表达式
[HtmlAttributeName("asp-for")]
public ModelExpression For { get; set; }
使用名称空间
using Microsoft.AspNetCore.Mvc.ViewFeatures;
完整代码:
[HtmlTargetElement("input", Attributes = "add-on-button,add-on-append",
ParentTag = "div")]
public class TextBoxButtonHelper : TagHelper
{
public string AddOnButton { get; set; }
public bool AddOnAppend { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput
output)
{
//Your code
}
[HtmlAttributeName("asp-for")]
public ModelExpression For { get; set; }
}
看起来您可以使用output.Content.SetHtmlContent()-当然可以使用复选框来清除html负载 如本文所述:
谢谢您的回答,但是您给出的解决方案没有一个能回答我的问题,而是帮助我找到了解决方案 这是两者的标记帮助器,如果有人想使用它,它可以很好地工作 带按钮+输入的输入组 我们正在寻找的html是:
<div class="input-group">
<input placeholder="Search" class="form-control" type="text" data-val="true" data-val-maxlength="Max" data-val-maxlength-max="5" id="SearchText" name="SearchText" value="" maxlength="5">
<span class="input-group-append">
<button class="btn btn-light" id="btnSearch" type="button">Search</button>
</span>
</div>
<div class="custom-control custom-control-primary custom-checkbox">
<input type="checkbox" data-val="true" data-val-required="The SearchActive field is required." id="SearchActive" name="SearchActive" value="true" class="custom-control-input">
<label class="custom-control-label" for="SearchActive">Only active</label>
<input name="SearchActive" type="hidden" value="false">
</div>
搜寻
最后一个助手标记是:
<input asp-for="SearchText" placeholder="Search" add-on-button="btnSearch" add-on-button-text="Search" add-on-button-icon="ti-search" add-on-append="true" class="form-control" />
<input asp-for="SearchActive" add-on-checkbox="Only active" />
如您所见,我们可以指示按钮的名称、文本和/或图标(我们可以使用图标、文本或两者构建按钮),还可以指示按钮是在开头还是结尾
这是标记帮助器:
[HtmlTargetElement("input", Attributes = "add-on-button,add-on-button-text,add-on-button-icon,add-on-append")]
public class TextBoxButtonTag : TagHelper
{
public string AddOnButton { get; set; }
public string AddOnButtonText { get; set; }
public string AddOnButtonIcon { get; set; }
public bool AddOnAppend { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput output)
{
var tagSpan = new TagBuilder("span");
tagSpan.AddCssClass(AddOnAppend ? "input-group-append" : "input-group-prepend");
var tagButton = new TagBuilder("button");
tagButton.Attributes.Add("id", AddOnButton);
tagButton.Attributes.Add("class", "btn btn-light");
tagButton.Attributes.Add("type", "button");
if (!string.IsNullOrEmpty(AddOnButtonIcon))
{
var tagButtonIcon = new TagBuilder("i");
tagButtonIcon.Attributes.Add("class", string.Concat("ti-search", string.IsNullOrEmpty(AddOnButtonText) ? "" : " pr-1"));
tagButtonIcon.Attributes.Add("style", "vertical-align: middle");
tagButton.InnerHtml.AppendHtml(tagButtonIcon);
}
tagButton.InnerHtml.AppendHtml(AddOnButtonText);
tagSpan.InnerHtml.AppendHtml(tagButton);
output.PreElement.AppendHtml(@"<div class='input-group'>");
if (AddOnAppend)
output.PostElement.AppendHtml(tagSpan);
else
output.PreElement.AppendHtml(tagSpan);
output.PostElement.AppendHtml("</div>");
}
}
[HtmlTargetElement("input", Attributes = "add-on-checkbox")]
public class CheckBoxTag : TagHelper
{
[HtmlAttributeName("asp-for")]
public ModelExpression Source { get; set; }
public string AddOnCheckbox { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput output)
{
output.Attributes.Add("class", "custom-control-input");
var tagLabel = new TagBuilder("label");
tagLabel.AddCssClass("custom-control-label");
tagLabel.Attributes.Add("for", Source.Name);
tagLabel.InnerHtml.Append(AddOnCheckbox);
var tagHidden = new TagBuilder("input");
tagHidden.Attributes.Add("name", Source.Name);
tagHidden.Attributes.Add("type", "hidden");
tagHidden.Attributes.Add("value", "false");
output.PreElement.AppendHtml(@"<div class='custom-control custom-control-primary custom-checkbox'>");
output.PostElement.AppendHtml(tagLabel);
output.PostElement.AppendHtml(tagHidden);
output.PostElement.AppendHtml("</div>");
}
}
[HtmlTargetElement(“输入”,Attributes=“加载项按钮,加载项按钮文本,加载项按钮图标,加载项附加”)]
公共类TextBoxButtonTag:TagHelper
{
公共字符串加载项按钮{get;set;}
公共字符串AddOnButtonText{get;set;}
公共字符串AddOnButtonNicon{get;set;}
公共bool AddOnAppend{get;set;}
公共覆盖无效进程(TagHelperContext上下文,TagHelperOutput输出)
{
var tagSpan=新标记生成器(“span”);
tagSpan.AddCssClass(AddOnAppend?“输入组追加”:“输入组前置”);
var tagButton=新标记生成器(“按钮”);
tagButton.Attributes.Add(“id”,AddOnButton);
tagButton.Attributes.Add(“类”、“btn btn灯”);
tagButton.Attributes.Add(“type”,“button”);
如果(!string.IsNullOrEmpty(addonButtonNicon))
{
var tagButtonIcon=新标记生成器(“i”);
tagButtonIcon.Attributes.Add(“class”,string.Concat(“ti search”,string.IsNullOrEmpty(AddOnButtonText)?”“:“pr-1”);
tagButtonIcon.Attributes.Add(“样式”,“垂直对齐:中间”);
tagButton.InnerHtml.AppendHtml(tagButtonIcon);
}
tagButton.InnerHtml.AppendHtml(AddOnButtonText);
tagSpan.InnerHtml.AppendHtml(tagButton);
output.PreElement.AppendHtml(@“”);
if(AddOnAppend)
output.PostElement.AppendHtml(tagSpan);
其他的
output.PreElement.AppendHtml(tagSpan);
output.PostElement.AppendHtml(“”);
}
}
特殊设计的复选框
我们正在寻找的html是:
<div class="input-group">
<input placeholder="Search" class="form-control" type="text" data-val="true" data-val-maxlength="Max" data-val-maxlength-max="5" id="SearchText" name="SearchText" value="" maxlength="5">
<span class="input-group-append">
<button class="btn btn-light" id="btnSearch" type="button">Search</button>
</span>
</div>
<div class="custom-control custom-control-primary custom-checkbox">
<input type="checkbox" data-val="true" data-val-required="The SearchActive field is required." id="SearchActive" name="SearchActive" value="true" class="custom-control-input">
<label class="custom-control-label" for="SearchActive">Only active</label>
<input name="SearchActive" type="hidden" value="false">
</div>
仅活动
最后一个助手标记是:
<input asp-for="SearchText" placeholder="Search" add-on-button="btnSearch" add-on-button-text="Search" add-on-button-icon="ti-search" add-on-append="true" class="form-control" />
<input asp-for="SearchActive" add-on-checkbox="Only active" />
这是标记帮助器:
[HtmlTargetElement("input", Attributes = "add-on-button,add-on-button-text,add-on-button-icon,add-on-append")]
public class TextBoxButtonTag : TagHelper
{
public string AddOnButton { get; set; }
public string AddOnButtonText { get; set; }
public string AddOnButtonIcon { get; set; }
public bool AddOnAppend { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput output)
{
var tagSpan = new TagBuilder("span");
tagSpan.AddCssClass(AddOnAppend ? "input-group-append" : "input-group-prepend");
var tagButton = new TagBuilder("button");
tagButton.Attributes.Add("id", AddOnButton);
tagButton.Attributes.Add("class", "btn btn-light");
tagButton.Attributes.Add("type", "button");
if (!string.IsNullOrEmpty(AddOnButtonIcon))
{
var tagButtonIcon = new TagBuilder("i");
tagButtonIcon.Attributes.Add("class", string.Concat("ti-search", string.IsNullOrEmpty(AddOnButtonText) ? "" : " pr-1"));
tagButtonIcon.Attributes.Add("style", "vertical-align: middle");
tagButton.InnerHtml.AppendHtml(tagButtonIcon);
}
tagButton.InnerHtml.AppendHtml(AddOnButtonText);
tagSpan.InnerHtml.AppendHtml(tagButton);
output.PreElement.AppendHtml(@"<div class='input-group'>");
if (AddOnAppend)
output.PostElement.AppendHtml(tagSpan);
else
output.PreElement.AppendHtml(tagSpan);
output.PostElement.AppendHtml("</div>");
}
}
[HtmlTargetElement("input", Attributes = "add-on-checkbox")]
public class CheckBoxTag : TagHelper
{
[HtmlAttributeName("asp-for")]
public ModelExpression Source { get; set; }
public string AddOnCheckbox { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput output)
{
output.Attributes.Add("class", "custom-control-input");
var tagLabel = new TagBuilder("label");
tagLabel.AddCssClass("custom-control-label");
tagLabel.Attributes.Add("for", Source.Name);
tagLabel.InnerHtml.Append(AddOnCheckbox);
var tagHidden = new TagBuilder("input");
tagHidden.Attributes.Add("name", Source.Name);
tagHidden.Attributes.Add("type", "hidden");
tagHidden.Attributes.Add("value", "false");
output.PreElement.AppendHtml(@"<div class='custom-control custom-control-primary custom-checkbox'>");
output.PostElement.AppendHtml(tagLabel);
output.PostElement.AppendHtml(tagHidden);
output.PostElement.AppendHtml("</div>");
}
}
[HtmlTargetElement(“输入”,Attributes=“添加到复选框”)]
公共类CheckBoxTag:TagHelper
{
[HtmlAttributeName(“asp for”)]
公共模型表达式源{get;set;}
公共字符串AddOnCheckbox{get;set;}
公共覆盖无效进程(TagHelperContext上下文,TagHelperOutput输出)
{
添加(“类”,“自定义控件输入”);
var tagLabel=新标记生成器(“标签”);
tagLabel.AddCssClass(“自定义控件标签”);
tagLabel.Attributes.Add(“for”,Source.Name);
tagLabel.InnerHtml.Append(AddOnCheckbox);
var tagHidden=新标记生成器(“输入”);
tagHidden.Attributes.Add(“name”,Source.name);
tagHidden.Attributes.Add(“type”,“hidden”);
tagHidden.Attributes.Add(“value”、“false”);
output.PreElement.AppendHtml(@“”);
output.PostElement.AppendHtml(tagLabel);
output.PostElement.AppendHtml(tagHidden);
output.PostElement.AppendHtml(“”);
}
}
为了工作,对于这两种情况,您都需要指示所有属性。有一种方法可以使这些属性成为可选的,但我不在这里实现
我希望这有助于别人,因为我还没有找到任何文章告诉如何做到这一点
谢谢你的帮助。我不明白你是如何解决这个问题的。在旧的MVC5中,我使用Html助手来创建那些“元素组”,并避免一直编写这么多标记,在aspnet core中,什么是最佳实践?将标记帮助程序与html帮助程序结合使用?