Mixing
InvalidOperationException: Incorrect Content-Type: Microsoft.AspNetCore.Http.Features.FormFeature.ReadForm()
I am new to Asp.net MVC Core. I am working on Server-side loading of JQuery Datatables.net using Asp.Net Core MVC Middleware.
I have used this tutorial to learn how to create a handler and then this article to migrate to middleware but are running into some issues that I hope you can help me with.
I have refined using this tutorial
I get error
"InvalidOperationException: Incorrect Content-Type: Microsoft.AspNetCore.Http.Features.FormFeature.ReadForm()"
when I run the solution.
Here is my code:
View
<script type="text/javascript">
$(document).ready(function () {
$('#datatable').DataTable({
//"paging": true,
//"ordering": true,
//"info": true,
'columns' : [
{ 'data': 'InsertedDateUtc' },
//{ 'data': 'EventId' },
{ 'data': 'UserId' },
{ 'data': 'Action' },
{ 'data': 'Context' },
{ 'data': 'RecordId' },
{ 'data': 'Property' },
{ 'data': 'OldValue' },
{ 'data': 'NewValue' },
],
'processing': true,
'serverSide': true,
'ajax' : {
'type' : 'POST',
'url' : '../AuditEventData.cs',
//'url': '../APIController/GetAuditEvents'
//'url' : '@Url.Action("GetAuditEvents", "APIController")'
'datatype': 'json',
}
});
});
</script>
Middleware
public class AuditEventData
{
private readonly RequestDelegate _next;
private readonly IDataGet _dataGet;
public AuditEventData(RequestDelegate next)
{
_next = next;
}
public async Task Invoke(HttpContext httpContext)
{
string result = null;
int filteredCount = 0;
var draw = httpContext.Request.Form["draw"].FirstOrDefault();
var start = int.Parse(httpContext.Request.Form["start"].FirstOrDefault());
var length = int.Parse(httpContext.Request.Form["length"].FirstOrDefault());
var sortCol = int.Parse(httpContext.Request.Form["columns[" + httpContext.Request.Form["order[0][column]"].FirstOrDefault() + "][name]"].FirstOrDefault());
var sortDir = httpContext.Request.Form["order[0][dir]"].FirstOrDefault();
var search = httpContext.Request.Form["search[value]"].FirstOrDefault();
try
{
var auditEvents = await _dataGet.GetServerSideAuditEvents(length, start, sortCol, sortDir, search);
filteredCount = auditEvents.Count();
var data = new
{
iTotalRecords = await _dataGet.GetTotalAuditEventCount(),
iTotalDisplayRecords = filteredCount,
aaData = auditEvents
};
result = JsonConvert.SerializeObject(data);
await httpContext.Response.WriteAsync(result);
}
catch (Exception e)
{
await ErrorHandler.HandleException(e);
}
await _next(httpContext);
}
}
// Extension method used to add the middleware to the HTTP request pipeline.
public static class MiddlewareExtensions
{
public static IApplicationBuilder UseAuditEventDataMiddleware(this IApplicationBuilder builder)
{
return builder.UseMiddleware<AuditEventData>();
}
}
Startup.cs
app.MapWhen(
context => context.Request.Path.ToString().EndsWith("ViewAudit"),
appBranch =>
{
appBranch.UseAuditEventDataMiddleware();
});
In the middleware class the line
var start = int.Parse(httpContext.Request.Form["start"].FirstOrDefault());
gives me the error - the tutorials and Microsoft documentation here seem to indicate that I do not need to use the ".Form" and should be able to just use
var start = int.Parse(httpContext.Request["start"].FirstOrDefault());
however, when I do that, I get this error
cannot apply indexing with to an expression of type 'HttpRequest'
I cannot find any examples on how to do this and any help will be appreciated
Thanks
asp.net-mvc datatables
asked Jan 2 at 23:37
FerdiFerdi
12
add a comment |
I am new to Asp.net MVC Core. I am working on Server-side loading of JQuery Datatables.net using Asp.Net Core MVC Middleware.
I have used this tutorial to learn how to create a handler and then this article to migrate to middleware but are running into some issues that I hope you can help me with.
I have refined using this tutorial
I get error
"InvalidOperationException: Incorrect Content-Type: Microsoft.AspNetCore.Http.Features.FormFeature.ReadForm()"
when I run the solution.
Here is my code:
View
<script type="text/javascript">
$(document).ready(function () {
$('#datatable').DataTable({
//"paging": true,
//"ordering": true,
//"info": true,
'columns' : [
{ 'data': 'InsertedDateUtc' },
//{ 'data': 'EventId' },
{ 'data': 'UserId' },
{ 'data': 'Action' },
{ 'data': 'Context' },
{ 'data': 'RecordId' },
{ 'data': 'Property' },
{ 'data': 'OldValue' },
{ 'data': 'NewValue' },
],
'processing': true,
'serverSide': true,
'ajax' : {
'type' : 'POST',
'url' : '../AuditEventData.cs',
//'url': '../APIController/GetAuditEvents'
//'url' : '@Url.Action("GetAuditEvents", "APIController")'
'datatype': 'json',
}
});
});
</script>
Middleware
public class AuditEventData
{
private readonly RequestDelegate _next;
private readonly IDataGet _dataGet;
public AuditEventData(RequestDelegate next)
{
_next = next;
}
public async Task Invoke(HttpContext httpContext)
{
string result = null;
int filteredCount = 0;
var draw = httpContext.Request.Form["draw"].FirstOrDefault();
var start = int.Parse(httpContext.Request.Form["start"].FirstOrDefault());
var length = int.Parse(httpContext.Request.Form["length"].FirstOrDefault());
var sortCol = int.Parse(httpContext.Request.Form["columns[" + httpContext.Request.Form["order[0][column]"].FirstOrDefault() + "][name]"].FirstOrDefault());
var sortDir = httpContext.Request.Form["order[0][dir]"].FirstOrDefault();
var search = httpContext.Request.Form["search[value]"].FirstOrDefault();
try
{
var auditEvents = await _dataGet.GetServerSideAuditEvents(length, start, sortCol, sortDir, search);
filteredCount = auditEvents.Count();
var data = new
{
iTotalRecords = await _dataGet.GetTotalAuditEventCount(),
iTotalDisplayRecords = filteredCount,
aaData = auditEvents
};
result = JsonConvert.SerializeObject(data);
await httpContext.Response.WriteAsync(result);
}
catch (Exception e)
{
await ErrorHandler.HandleException(e);
}
await _next(httpContext);
}
}
// Extension method used to add the middleware to the HTTP request pipeline.
public static class MiddlewareExtensions
{
public static IApplicationBuilder UseAuditEventDataMiddleware(this IApplicationBuilder builder)
{
return builder.UseMiddleware<AuditEventData>();
}
}
Startup.cs
app.MapWhen(
context => context.Request.Path.ToString().EndsWith("ViewAudit"),
appBranch =>
{
appBranch.UseAuditEventDataMiddleware();
});
In the middleware class the line
var start = int.Parse(httpContext.Request.Form["start"].FirstOrDefault());
gives me the error - the tutorials and Microsoft documentation here seem to indicate that I do not need to use the ".Form" and should be able to just use
var start = int.Parse(httpContext.Request["start"].FirstOrDefault());
however, when I do that, I get this error
cannot apply indexing with to an expression of type 'HttpRequest'
I cannot find any examples on how to do this and any help will be appreciated
Thanks
asp.net-mvc datatables
asked Jan 2 at 23:37
FerdiFerdi
12
i suspectedhttpContext.Requestdoesn't containFormobject because it passed from different request other than form submit. I recommend to use viewmodel class instead ofRequest.Form.
– Tetsuya Yamamoto
Jan 3 at 2:25
Hi @TetsuyaYamamoto Thanks for your comment. I have to pass in httpcontext as that is a requirement for the middleware class and hence I cannot pass in the ViewModel. I also do not think thehttpContext.Request.Formis correct, and in all the examples I have seen onlyhttpContext.Requestis used. However that does not seem to work for me
– Ferdi
Jan 4 at 22:10
add a comment |
I am new to Asp.net MVC Core. I am working on Server-side loading of JQuery Datatables.net using Asp.Net Core MVC Middleware.
I have used this tutorial to learn how to create a handler and then this article to migrate to middleware but are running into some issues that I hope you can help me with.
I have refined using this tutorial
I get error
"InvalidOperationException: Incorrect Content-Type: Microsoft.AspNetCore.Http.Features.FormFeature.ReadForm()"
when I run the solution.
Here is my code:
View
<script type="text/javascript">
$(document).ready(function () {
$('#datatable').DataTable({
//"paging": true,
//"ordering": true,
//"info": true,
'columns' : [
{ 'data': 'InsertedDateUtc' },
//{ 'data': 'EventId' },
{ 'data': 'UserId' },
{ 'data': 'Action' },
{ 'data': 'Context' },
{ 'data': 'RecordId' },
{ 'data': 'Property' },
{ 'data': 'OldValue' },
{ 'data': 'NewValue' },
],
'processing': true,
'serverSide': true,
'ajax' : {
'type' : 'POST',
'url' : '../AuditEventData.cs',
//'url': '../APIController/GetAuditEvents'
//'url' : '@Url.Action("GetAuditEvents", "APIController")'
'datatype': 'json',
}
});
});
</script>
Middleware
public class AuditEventData
{
private readonly RequestDelegate _next;
private readonly IDataGet _dataGet;
public AuditEventData(RequestDelegate next)
{
_next = next;
}
public async Task Invoke(HttpContext httpContext)
{
string result = null;
int filteredCount = 0;
var draw = httpContext.Request.Form["draw"].FirstOrDefault();
var start = int.Parse(httpContext.Request.Form["start"].FirstOrDefault());
var length = int.Parse(httpContext.Request.Form["length"].FirstOrDefault());
var sortCol = int.Parse(httpContext.Request.Form["columns[" + httpContext.Request.Form["order[0][column]"].FirstOrDefault() + "][name]"].FirstOrDefault());
var sortDir = httpContext.Request.Form["order[0][dir]"].FirstOrDefault();
var search = httpContext.Request.Form["search[value]"].FirstOrDefault();
try
{
var auditEvents = await _dataGet.GetServerSideAuditEvents(length, start, sortCol, sortDir, search);
filteredCount = auditEvents.Count();
var data = new
{
iTotalRecords = await _dataGet.GetTotalAuditEventCount(),
iTotalDisplayRecords = filteredCount,
aaData = auditEvents
};
result = JsonConvert.SerializeObject(data);
await httpContext.Response.WriteAsync(result);
}
catch (Exception e)
{
await ErrorHandler.HandleException(e);
}
await _next(httpContext);
}
}
// Extension method used to add the middleware to the HTTP request pipeline.
public static class MiddlewareExtensions
{
public static IApplicationBuilder UseAuditEventDataMiddleware(this IApplicationBuilder builder)
{
return builder.UseMiddleware<AuditEventData>();
}
}
Startup.cs
app.MapWhen(
context => context.Request.Path.ToString().EndsWith("ViewAudit"),
appBranch =>
{
appBranch.UseAuditEventDataMiddleware();
});
In the middleware class the line
var start = int.Parse(httpContext.Request.Form["start"].FirstOrDefault());
gives me the error - the tutorials and Microsoft documentation here seem to indicate that I do not need to use the ".Form" and should be able to just use
var start = int.Parse(httpContext.Request["start"].FirstOrDefault());
however, when I do that, I get this error
cannot apply indexing with to an expression of type 'HttpRequest'
I cannot find any examples on how to do this and any help will be appreciated
Thanks
asp.net-mvc datatables
asked Jan 2 at 23:37
FerdiFerdi
12
I am new to Asp.net MVC Core. I am working on Server-side loading of JQuery Datatables.net using Asp.Net Core MVC Middleware.
I have used this tutorial to learn how to create a handler and then this article to migrate to middleware but are running into some issues that I hope you can help me with.
I have refined using this tutorial
I get error
"InvalidOperationException: Incorrect Content-Type: Microsoft.AspNetCore.Http.Features.FormFeature.ReadForm()"
when I run the solution.
Here is my code:
View
<script type="text/javascript">
$(document).ready(function () {
$('#datatable').DataTable({
//"paging": true,
//"ordering": true,
//"info": true,
'columns' : [
{ 'data': 'InsertedDateUtc' },
//{ 'data': 'EventId' },
{ 'data': 'UserId' },
{ 'data': 'Action' },
{ 'data': 'Context' },
{ 'data': 'RecordId' },
{ 'data': 'Property' },
{ 'data': 'OldValue' },
{ 'data': 'NewValue' },
],
'processing': true,
'serverSide': true,
'ajax' : {
'type' : 'POST',
'url' : '../AuditEventData.cs',
//'url': '../APIController/GetAuditEvents'
//'url' : '@Url.Action("GetAuditEvents", "APIController")'
'datatype': 'json',
}
});
});
</script>
Middleware
public class AuditEventData
{
private readonly RequestDelegate _next;
private readonly IDataGet _dataGet;
public AuditEventData(RequestDelegate next)
{
_next = next;
}
public async Task Invoke(HttpContext httpContext)
{
string result = null;
int filteredCount = 0;
var draw = httpContext.Request.Form["draw"].FirstOrDefault();
var start = int.Parse(httpContext.Request.Form["start"].FirstOrDefault());
var length = int.Parse(httpContext.Request.Form["length"].FirstOrDefault());
var sortCol = int.Parse(httpContext.Request.Form["columns[" + httpContext.Request.Form["order[0][column]"].FirstOrDefault() + "][name]"].FirstOrDefault());
var sortDir = httpContext.Request.Form["order[0][dir]"].FirstOrDefault();
var search = httpContext.Request.Form["search[value]"].FirstOrDefault();
try
{
var auditEvents = await _dataGet.GetServerSideAuditEvents(length, start, sortCol, sortDir, search);
filteredCount = auditEvents.Count();
var data = new
{
iTotalRecords = await _dataGet.GetTotalAuditEventCount(),
iTotalDisplayRecords = filteredCount,
aaData = auditEvents
};
result = JsonConvert.SerializeObject(data);
await httpContext.Response.WriteAsync(result);
}
catch (Exception e)
{
await ErrorHandler.HandleException(e);
}
await _next(httpContext);
}
}
// Extension method used to add the middleware to the HTTP request pipeline.
public static class MiddlewareExtensions
{
public static IApplicationBuilder UseAuditEventDataMiddleware(this IApplicationBuilder builder)
{
return builder.UseMiddleware<AuditEventData>();
}
}
Startup.cs
app.MapWhen(
context => context.Request.Path.ToString().EndsWith("ViewAudit"),
appBranch =>
{
appBranch.UseAuditEventDataMiddleware();
});
In the middleware class the line
var start = int.Parse(httpContext.Request.Form["start"].FirstOrDefault());
gives me the error - the tutorials and Microsoft documentation here seem to indicate that I do not need to use the ".Form" and should be able to just use
var start = int.Parse(httpContext.Request["start"].FirstOrDefault());
however, when I do that, I get this error
cannot apply indexing with to an expression of type 'HttpRequest'
I cannot find any examples on how to do this and any help will be appreciated
Thanks
asp.net-mvc datatables
asp.net-mvc datatables
asked Jan 2 at 23:37
FerdiFerdi
12
asked Jan 2 at 23:37
FerdiFerdi
12
edited Jan 2 at 23:57
Ferdi
asked Jan 2 at 23:37
FerdiFerdi
12
asked Jan 2 at 23:37
FerdiFerdi
12
asked Jan 2 at 23:37
FerdiFerdi
12
12
i suspectedhttpContext.Requestdoesn't containFormobject because it passed from different request other than form submit. I recommend to use viewmodel class instead ofRequest.Form.
– Tetsuya Yamamoto
Jan 3 at 2:25
Hi @TetsuyaYamamoto Thanks for your comment. I have to pass in httpcontext as that is a requirement for the middleware class and hence I cannot pass in the ViewModel. I also do not think thehttpContext.Request.Formis correct, and in all the examples I have seen onlyhttpContext.Requestis used. However that does not seem to work for me
– Ferdi
Jan 4 at 22:10
add a comment |
i suspectedhttpContext.Requestdoesn't containFormobject because it passed from different request other than form submit. I recommend to use viewmodel class instead ofRequest.Form.
– Tetsuya Yamamoto
Jan 3 at 2:25
Hi @TetsuyaYamamoto Thanks for your comment. I have to pass in httpcontext as that is a requirement for the middleware class and hence I cannot pass in the ViewModel. I also do not think thehttpContext.Request.Formis correct, and in all the examples I have seen onlyhttpContext.Requestis used. However that does not seem to work for me
– Ferdi
Jan 4 at 22:10
i suspected
httpContext.Request doesn't contain Form object because it passed from different request other than form submit. I recommend to use viewmodel class instead of Request.Form.– Tetsuya Yamamoto
Jan 3 at 2:25
i suspected
httpContext.Request doesn't contain Form object because it passed from different request other than form submit. I recommend to use viewmodel class instead of Request.Form.– Tetsuya Yamamoto
Jan 3 at 2:25
Hi @TetsuyaYamamoto Thanks for your comment. I have to pass in httpcontext as that is a requirement for the middleware class and hence I cannot pass in the ViewModel. I also do not think the
httpContext.Request.Form is correct, and in all the examples I have seen only httpContext.Request is used. However that does not seem to work for me– Ferdi
Jan 4 at 22:10
Hi @TetsuyaYamamoto Thanks for your comment. I have to pass in httpcontext as that is a requirement for the middleware class and hence I cannot pass in the ViewModel. I also do not think the
httpContext.Request.Form is correct, and in all the examples I have seen only httpContext.Request is used. However that does not seem to work for me– Ferdi
Jan 4 at 22:10
add a comment |
0
active
oldest
votes
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%2f54014589%2finvalidoperationexception-incorrect-content-type-microsoft-aspnetcore-http-fea%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
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%2f54014589%2finvalidoperationexception-incorrect-content-type-microsoft-aspnetcore-http-fea%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
i suspected
httpContext.Requestdoesn't containFormobject because it passed from different request other than form submit. I recommend to use viewmodel class instead ofRequest.Form.– Tetsuya Yamamoto
Jan 3 at 2:25
Hi @TetsuyaYamamoto Thanks for your comment. I have to pass in httpcontext as that is a requirement for the middleware class and hence I cannot pass in the ViewModel. I also do not think the
httpContext.Request.Formis correct, and in all the examples I have seen onlyhttpContext.Requestis used. However that does not seem to work for me– Ferdi
Jan 4 at 22:10