Mixing
Custom tag helper not working
I followed a few guides on creating a custom tag helper for ASP Core.
This is my helper:
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Razor.TagHelpers;
using System;
namespace ToolControlSystem.TagHelpers
{
[HtmlTargetElement("description", Attributes = DescriptionAttributeName, TagStructure = TagStructure.NormalOrSelfClosing)]
public class DescriptionTagHelper : TagHelper
{
private const string DescriptionAttributeName = "asp-for";
[HtmlAttributeName(DescriptionAttributeName)]
public ModelExpression Model { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput output)
{
base.Process(context, output);
var description = GetDescription(Model.ModelExplorer);
output.TagName = "span";
output.TagMode = TagMode.StartTagAndEndTag;
output.Content.SetContent(description);
}
private string GetDescription(ModelExplorer modelExplorer)
{
string description;
description = modelExplorer.Metadata.Placeholder;
if (String.IsNullOrWhiteSpace(description))
{
description = modelExplorer.Metadata.Description;
}
return description;
}
}
}
I drop this in _ViewImports.cshtml: @addTagHelper *, ToolConstrolSystem.TagHelpers
Annnndd... nothing. No intellisense, no tag replacing...
Any ideas?
c# asp.net-core model asp.net-core-tag-helpers
edited May 11 '18 at 22:47
Camilo Terevinto
18.7k63666
asked Jan 15 '18 at 22:23
Matthew GoulartMatthew Goulart
1,008927
add a comment |
I followed a few guides on creating a custom tag helper for ASP Core.
This is my helper:
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Razor.TagHelpers;
using System;
namespace ToolControlSystem.TagHelpers
{
[HtmlTargetElement("description", Attributes = DescriptionAttributeName, TagStructure = TagStructure.NormalOrSelfClosing)]
public class DescriptionTagHelper : TagHelper
{
private const string DescriptionAttributeName = "asp-for";
[HtmlAttributeName(DescriptionAttributeName)]
public ModelExpression Model { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput output)
{
base.Process(context, output);
var description = GetDescription(Model.ModelExplorer);
output.TagName = "span";
output.TagMode = TagMode.StartTagAndEndTag;
output.Content.SetContent(description);
}
private string GetDescription(ModelExplorer modelExplorer)
{
string description;
description = modelExplorer.Metadata.Placeholder;
if (String.IsNullOrWhiteSpace(description))
{
description = modelExplorer.Metadata.Description;
}
return description;
}
}
}
I drop this in _ViewImports.cshtml: @addTagHelper *, ToolConstrolSystem.TagHelpers
Annnndd... nothing. No intellisense, no tag replacing...
Any ideas?
c# asp.net-core model asp.net-core-tag-helpers
edited May 11 '18 at 22:47
Camilo Terevinto
18.7k63666
asked Jan 15 '18 at 22:23
Matthew GoulartMatthew Goulart
1,008927
add a comment |
I followed a few guides on creating a custom tag helper for ASP Core.
This is my helper:
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Razor.TagHelpers;
using System;
namespace ToolControlSystem.TagHelpers
{
[HtmlTargetElement("description", Attributes = DescriptionAttributeName, TagStructure = TagStructure.NormalOrSelfClosing)]
public class DescriptionTagHelper : TagHelper
{
private const string DescriptionAttributeName = "asp-for";
[HtmlAttributeName(DescriptionAttributeName)]
public ModelExpression Model { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput output)
{
base.Process(context, output);
var description = GetDescription(Model.ModelExplorer);
output.TagName = "span";
output.TagMode = TagMode.StartTagAndEndTag;
output.Content.SetContent(description);
}
private string GetDescription(ModelExplorer modelExplorer)
{
string description;
description = modelExplorer.Metadata.Placeholder;
if (String.IsNullOrWhiteSpace(description))
{
description = modelExplorer.Metadata.Description;
}
return description;
}
}
}
I drop this in _ViewImports.cshtml: @addTagHelper *, ToolConstrolSystem.TagHelpers
Annnndd... nothing. No intellisense, no tag replacing...
Any ideas?
c# asp.net-core model asp.net-core-tag-helpers
edited May 11 '18 at 22:47
Camilo Terevinto
18.7k63666
asked Jan 15 '18 at 22:23
Matthew GoulartMatthew Goulart
1,008927
I followed a few guides on creating a custom tag helper for ASP Core.
This is my helper:
using Microsoft.AspNetCore.Mvc.ViewFeatures;
using Microsoft.AspNetCore.Razor.TagHelpers;
using System;
namespace ToolControlSystem.TagHelpers
{
[HtmlTargetElement("description", Attributes = DescriptionAttributeName, TagStructure = TagStructure.NormalOrSelfClosing)]
public class DescriptionTagHelper : TagHelper
{
private const string DescriptionAttributeName = "asp-for";
[HtmlAttributeName(DescriptionAttributeName)]
public ModelExpression Model { get; set; }
public override void Process(TagHelperContext context, TagHelperOutput output)
{
base.Process(context, output);
var description = GetDescription(Model.ModelExplorer);
output.TagName = "span";
output.TagMode = TagMode.StartTagAndEndTag;
output.Content.SetContent(description);
}
private string GetDescription(ModelExplorer modelExplorer)
{
string description;
description = modelExplorer.Metadata.Placeholder;
if (String.IsNullOrWhiteSpace(description))
{
description = modelExplorer.Metadata.Description;
}
return description;
}
}
}
I drop this in _ViewImports.cshtml: @addTagHelper *, ToolConstrolSystem.TagHelpers
Annnndd... nothing. No intellisense, no tag replacing...
Any ideas?
c# asp.net-core model asp.net-core-tag-helpers
c# asp.net-core model asp.net-core-tag-helpers
edited May 11 '18 at 22:47
Camilo Terevinto
18.7k63666
asked Jan 15 '18 at 22:23
Matthew GoulartMatthew Goulart
1,008927
edited May 11 '18 at 22:47
Camilo Terevinto
18.7k63666
asked Jan 15 '18 at 22:23
Matthew GoulartMatthew Goulart
1,008927
edited May 11 '18 at 22:47
Camilo Terevinto
18.7k63666
edited May 11 '18 at 22:47
Camilo Terevinto
18.7k63666
edited May 11 '18 at 22:47
Camilo Terevinto
18.7k63666
18.7k63666
asked Jan 15 '18 at 22:23
Matthew GoulartMatthew Goulart
1,008927
asked Jan 15 '18 at 22:23
Matthew GoulartMatthew Goulart
1,008927
asked Jan 15 '18 at 22:23
Matthew GoulartMatthew Goulart
1,008927
1,008927
add a comment |
add a comment |
3 Answers
3
active
oldest
votes
You need to provide only assembly name in the view imports file.
_ViewImports.cshtml:
@addTagHelper *, ToolConstrolSystem
answered Jan 16 '18 at 0:39
AnurajAnuraj
12.9k33763
5
This was really annoying. Thanks for the answear.
– Edgar Salazar
Apr 6 '18 at 16:52
5
Wow, that should be at least (!) in bold in documentation. Spent a few hours too guessing what did go wrong.
– Mikhail
Apr 21 '18 at 10:17
3
Documentation makes it look like it's a namespace, not an assembly name. *faceplam*
– qJake
Jun 12 '18 at 20:54
The assembly name!! I had the namespace. 3 hours lost until I read this.
– Alpha75
Nov 28 '18 at 11:54
TimeSpentOnThinkingItWasANamespace+=TimeSpan.FromMinutes(15);
– agrath
Jan 6 at 2:43
|
show 1 more comment
See Managing Tag Helper scope
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@addTagHelper *, AuthoringTagHelpers
The code above uses the wildcard syntax ("*") to specify that all Tag Helpers in the specified assembly (Microsoft.AspNetCore.Mvc.TagHelpers) will be available to every view file in the Views directory or sub-directory.
answered Jun 13 '18 at 20:08
RickAndMSFTRickAndMSFT
11k53955
add a comment |
So I wasted a bit of time chasing the problem where a taghelper was not working. After a while I went to bed and today with fresh eyes I gave it another try, was then that I realized that I did not add the @addTagHelper in the Razor Pages folder only in the Views folder.
So if you like I have this /Pages + /Views concepts make sure to go through all those _ViewImports.cshtml.
Leaving this note here hopefully will remind someelse's tired brain, and if it helped take a break and go for a walk or a snooze.
answered Dec 24 '18 at 15:26
Rui LimaRui Lima
4,72332237
add a comment |
Your Answer
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f48271514%2fcustom-tag-helper-not-working%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
You need to provide only assembly name in the view imports file.
_ViewImports.cshtml:
@addTagHelper *, ToolConstrolSystem
answered Jan 16 '18 at 0:39
AnurajAnuraj
12.9k33763
5
This was really annoying. Thanks for the answear.
– Edgar Salazar
Apr 6 '18 at 16:52
5
Wow, that should be at least (!) in bold in documentation. Spent a few hours too guessing what did go wrong.
– Mikhail
Apr 21 '18 at 10:17
3
Documentation makes it look like it's a namespace, not an assembly name. *faceplam*
– qJake
Jun 12 '18 at 20:54
The assembly name!! I had the namespace. 3 hours lost until I read this.
– Alpha75
Nov 28 '18 at 11:54
TimeSpentOnThinkingItWasANamespace+=TimeSpan.FromMinutes(15);
– agrath
Jan 6 at 2:43
|
show 1 more comment
You need to provide only assembly name in the view imports file.
_ViewImports.cshtml:
@addTagHelper *, ToolConstrolSystem
answered Jan 16 '18 at 0:39
AnurajAnuraj
12.9k33763
5
This was really annoying. Thanks for the answear.
– Edgar Salazar
Apr 6 '18 at 16:52
5
Wow, that should be at least (!) in bold in documentation. Spent a few hours too guessing what did go wrong.
– Mikhail
Apr 21 '18 at 10:17
3
Documentation makes it look like it's a namespace, not an assembly name. *faceplam*
– qJake
Jun 12 '18 at 20:54
The assembly name!! I had the namespace. 3 hours lost until I read this.
– Alpha75
Nov 28 '18 at 11:54
TimeSpentOnThinkingItWasANamespace+=TimeSpan.FromMinutes(15);
– agrath
Jan 6 at 2:43
|
show 1 more comment
You need to provide only assembly name in the view imports file.
_ViewImports.cshtml:
@addTagHelper *, ToolConstrolSystem
answered Jan 16 '18 at 0:39
AnurajAnuraj
12.9k33763
You need to provide only assembly name in the view imports file.
_ViewImports.cshtml:
@addTagHelper *, ToolConstrolSystem
answered Jan 16 '18 at 0:39
AnurajAnuraj
12.9k33763
edited Nov 22 '18 at 2:30
answered Jan 16 '18 at 0:39
AnurajAnuraj
12.9k33763
answered Jan 16 '18 at 0:39
AnurajAnuraj
12.9k33763
answered Jan 16 '18 at 0:39
AnurajAnuraj
12.9k33763
12.9k33763
5
This was really annoying. Thanks for the answear.
– Edgar Salazar
Apr 6 '18 at 16:52
5
Wow, that should be at least (!) in bold in documentation. Spent a few hours too guessing what did go wrong.
– Mikhail
Apr 21 '18 at 10:17
3
Documentation makes it look like it's a namespace, not an assembly name. *faceplam*
– qJake
Jun 12 '18 at 20:54
The assembly name!! I had the namespace. 3 hours lost until I read this.
– Alpha75
Nov 28 '18 at 11:54
TimeSpentOnThinkingItWasANamespace+=TimeSpan.FromMinutes(15);
– agrath
Jan 6 at 2:43
|
show 1 more comment
5
This was really annoying. Thanks for the answear.
– Edgar Salazar
Apr 6 '18 at 16:52
5
Wow, that should be at least (!) in bold in documentation. Spent a few hours too guessing what did go wrong.
– Mikhail
Apr 21 '18 at 10:17
3
Documentation makes it look like it's a namespace, not an assembly name. *faceplam*
– qJake
Jun 12 '18 at 20:54
The assembly name!! I had the namespace. 3 hours lost until I read this.
– Alpha75
Nov 28 '18 at 11:54
TimeSpentOnThinkingItWasANamespace+=TimeSpan.FromMinutes(15);
– agrath
Jan 6 at 2:43
5
5
This was really annoying. Thanks for the answear.
– Edgar Salazar
Apr 6 '18 at 16:52
This was really annoying. Thanks for the answear.
– Edgar Salazar
Apr 6 '18 at 16:52
5
5
Wow, that should be at least (!) in bold in documentation. Spent a few hours too guessing what did go wrong.
– Mikhail
Apr 21 '18 at 10:17
Wow, that should be at least (!) in bold in documentation. Spent a few hours too guessing what did go wrong.
– Mikhail
Apr 21 '18 at 10:17
3
3
Documentation makes it look like it's a namespace, not an assembly name. *faceplam*
– qJake
Jun 12 '18 at 20:54
Documentation makes it look like it's a namespace, not an assembly name. *faceplam*
– qJake
Jun 12 '18 at 20:54
The assembly name!! I had the namespace. 3 hours lost until I read this.
– Alpha75
Nov 28 '18 at 11:54
The assembly name!! I had the namespace. 3 hours lost until I read this.
– Alpha75
Nov 28 '18 at 11:54
TimeSpentOnThinkingItWasANamespace+=TimeSpan.FromMinutes(15);
– agrath
Jan 6 at 2:43
TimeSpentOnThinkingItWasANamespace+=TimeSpan.FromMinutes(15);
– agrath
Jan 6 at 2:43
|
show 1 more comment
See Managing Tag Helper scope
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@addTagHelper *, AuthoringTagHelpers
The code above uses the wildcard syntax ("*") to specify that all Tag Helpers in the specified assembly (Microsoft.AspNetCore.Mvc.TagHelpers) will be available to every view file in the Views directory or sub-directory.
answered Jun 13 '18 at 20:08
RickAndMSFTRickAndMSFT
11k53955
add a comment |
See Managing Tag Helper scope
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@addTagHelper *, AuthoringTagHelpers
The code above uses the wildcard syntax ("*") to specify that all Tag Helpers in the specified assembly (Microsoft.AspNetCore.Mvc.TagHelpers) will be available to every view file in the Views directory or sub-directory.
answered Jun 13 '18 at 20:08
RickAndMSFTRickAndMSFT
11k53955
add a comment |
See Managing Tag Helper scope
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@addTagHelper *, AuthoringTagHelpers
The code above uses the wildcard syntax ("*") to specify that all Tag Helpers in the specified assembly (Microsoft.AspNetCore.Mvc.TagHelpers) will be available to every view file in the Views directory or sub-directory.
answered Jun 13 '18 at 20:08
RickAndMSFTRickAndMSFT
11k53955
See Managing Tag Helper scope
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@addTagHelper *, AuthoringTagHelpers
The code above uses the wildcard syntax ("*") to specify that all Tag Helpers in the specified assembly (Microsoft.AspNetCore.Mvc.TagHelpers) will be available to every view file in the Views directory or sub-directory.
answered Jun 13 '18 at 20:08
RickAndMSFTRickAndMSFT
11k53955
answered Jun 13 '18 at 20:08
RickAndMSFTRickAndMSFT
11k53955
answered Jun 13 '18 at 20:08
RickAndMSFTRickAndMSFT
11k53955
answered Jun 13 '18 at 20:08
RickAndMSFTRickAndMSFT
11k53955
11k53955
add a comment |
add a comment |
So I wasted a bit of time chasing the problem where a taghelper was not working. After a while I went to bed and today with fresh eyes I gave it another try, was then that I realized that I did not add the @addTagHelper in the Razor Pages folder only in the Views folder.
So if you like I have this /Pages + /Views concepts make sure to go through all those _ViewImports.cshtml.
Leaving this note here hopefully will remind someelse's tired brain, and if it helped take a break and go for a walk or a snooze.
answered Dec 24 '18 at 15:26
Rui LimaRui Lima
4,72332237
add a comment |
So I wasted a bit of time chasing the problem where a taghelper was not working. After a while I went to bed and today with fresh eyes I gave it another try, was then that I realized that I did not add the @addTagHelper in the Razor Pages folder only in the Views folder.
So if you like I have this /Pages + /Views concepts make sure to go through all those _ViewImports.cshtml.
Leaving this note here hopefully will remind someelse's tired brain, and if it helped take a break and go for a walk or a snooze.
answered Dec 24 '18 at 15:26
Rui LimaRui Lima
4,72332237
add a comment |
So I wasted a bit of time chasing the problem where a taghelper was not working. After a while I went to bed and today with fresh eyes I gave it another try, was then that I realized that I did not add the @addTagHelper in the Razor Pages folder only in the Views folder.
So if you like I have this /Pages + /Views concepts make sure to go through all those _ViewImports.cshtml.
Leaving this note here hopefully will remind someelse's tired brain, and if it helped take a break and go for a walk or a snooze.
answered Dec 24 '18 at 15:26
Rui LimaRui Lima
4,72332237
So I wasted a bit of time chasing the problem where a taghelper was not working. After a while I went to bed and today with fresh eyes I gave it another try, was then that I realized that I did not add the @addTagHelper in the Razor Pages folder only in the Views folder.
So if you like I have this /Pages + /Views concepts make sure to go through all those _ViewImports.cshtml.
Leaving this note here hopefully will remind someelse's tired brain, and if it helped take a break and go for a walk or a snooze.
answered Dec 24 '18 at 15:26
Rui LimaRui Lima
4,72332237
answered Dec 24 '18 at 15:26
Rui LimaRui Lima
4,72332237
answered Dec 24 '18 at 15:26
Rui LimaRui Lima
4,72332237
answered Dec 24 '18 at 15:26
Rui LimaRui Lima
4,72332237
4,72332237
add a comment |
add a comment |
Thanks for contributing an answer to Stack Overflow!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f48271514%2fcustom-tag-helper-not-working%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
