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That's a commercial toolkit, which presumably comes with support.
Telerik support are the only people who can assist you with bugs in their software.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Hi All,
I am trying to return a DataSet that has 6 table to a cshtml file from Web Api, that DataSet is created by using the Entities from Entity Framework the reason I am returning the DataSet is I am converting the Entity Collections as Tables and wrapping them in a DataSet and returning that.
But I am getting the following Exceptions, anybody can please help me in fixing it? Here is my Get method Code:
public DataSet Get()
{
DataSet dsAllListsOfForm = new DataSet();
dsAllListsOfForm.Tables.Clear();
dynamic objCollection; DataTable table;
using (AppDevSecEntities ctx = new AppDevSecEntities())
{
objCollection = (from c in ctx.Departments orderby c.DepartmentName select c).AsQueryable();
table = Common.ConvertToDataTable<Department>(objCollection);
dsAllListsOfForm.Tables.Add(table);
objCollection = (from c in ctx.FunctionalCatagories orderby c.FunctionalCatagoryName select c).AsQueryable();
table = Common.ConvertToDataTable<FunctionalCatagory>(objCollection);
dsAllListsOfForm.Tables.Add(table);
objCollection = (from c in ctx.BusinessUnits orderby c.BusinessUnitName select c).AsQueryable();
table = Common.ConvertToDataTable<BusinessUnit>(objCollection);
dsAllListsOfForm.Tables.Add(table);
objCollection = (from c in ctx.Locations orderby c.LocationName select c).AsQueryable();
table = Common.ConvertToDataTable<Location>(objCollection);
dsAllListsOfForm.Tables.Add(table);
}
return dsAllListsOfForm;
}
Any help/suggestion is going to be very helpful, I am really new to the MVC and FrontEnd tools because I was working with Integrations for quite a While, thanks in advance.
Thanks,
Abdul Aleem
"There is already enough hatred in the world lets spread love, compassion and affection."
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The full error would be helpful.
There are two kinds of people in the world: those who can extrapolate from incomplete data.
There are only 10 types of people in the world, those who understand binary and those who don't.
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{"Message":"An error has occurred.","ExceptionMessage":"The 'ObjectContent1' type failed to serialize the response body for content type 'application/json; charset=utf-8'.","ExceptionType":"System.InvalidOperationException","StackTrace":null,"InnerException":{"Message":"An error has occurred.","ExceptionMessage":"Error getting value from 'UserJobRoles' on 'System.Data.Entity.DynamicProxies.UserJob_8B6D07991013E40D2C8A48D1247E9769FA4695229DBE170A0749E3AB1ADC9D3C'.","ExceptionType":"Newtonsoft.Json.JsonSerializationException","StackTrace":" at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.CalculatePropertyValues(JsonWriter writer, Object value, JsonContainerContract contract, JsonProperty member, JsonProperty property, JsonContract& memberContract, Object& memberValue)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject(JsonWriter writer, Object value, JsonObjectContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)\r\n at Newtonsoft.Json.Serialization.JsonSerializerProxy.SerializeInternal(JsonWriter jsonWriter, Object value, Type rootType)\r\n at Newtonsoft.Json.Converters.DataTableConverter.WriteJson(JsonWriter writer, Object value, JsonSerializer serializer)\r\n at Newtonsoft.Json.Converters.DataSetConverter.WriteJson(JsonWriter writer, Object value, JsonSerializer serializer)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeConvertable(JsonWriter writer, JsonConverter converter, Object value, JsonContract contract, JsonContainerContract collectionContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty)\r\n at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType)\r\n at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, HttpContent content)\r\n at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, CancellationToken cancellationToken)\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.WebHost.HttpControllerHandler.<WriteBufferedResponseContentAsync>d__1b.MoveNext()","InnerException":{"Message":"An error has occurred.","ExceptionMessage":"The ObjectContext instance has been disposed and can no longer be used for operations that require a connection.","ExceptionType":"System.ObjectDisposedException","StackTrace":" at System.Data.Entity.Core.Objects.ObjectContext.get_Connection()\r\n at System.Data.Entity.Core.Objects.ObjectQuery1.GetResults(Nullable1 forMergeOption)\r\n at System.Data.Entity.Core.Objects.ObjectQuery1.Execute(MergeOption mergeOption)\r\n at System.Data.Entity.Core.Objects.DataClasses.EntityCollection1.Load(List1 collection, MergeOption mergeOption)\r\n at System.Data.Entity.Core.Objects.DataClasses.EntityCollection1.Load(MergeOption mergeOption)\r\n at System.Data.Entity.Core.Objects.DataClasses.RelatedEnd.DeferredLoad()\r\n at System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.LoadProperty[TItem](TItem propertyValue, String relationshipName, String targetRoleName, Boolean mustBeNull, Object wrapperObject)\r\n at System.Data.Entity.Core.Objects.Internal.LazyLoadBehavior.<>c__DisplayClass72.<getinterceptordelegate>b__1(TProxy proxy, TItem item)\r\n at System.Data.Entity.DynamicProxies.UserJob_8B6D07991013E40D2C8A48D1247E9769FA4695229DBE170A0749E3AB1ADC9D3C.get_UserJobRoles()\r\n at GetUserJobRoles(Object )\r\n at Newtonsoft.Json.Serialization.DynamicValueProvider.GetValue(Object target)"}}}
Thanks,
Abdul Aleem
"There is already enough hatred in the world lets spread love, compassion and affection."
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This appears to be the important part: "The ObjectContext instance has been disposed and can no longer be used for operations that require a connection."
There are two kinds of people in the world: those who can extrapolate from incomplete data.
There are only 10 types of people in the world, those who understand binary and those who don't.
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indian143 wrote: the reason I am returning the DataSet is I am converting the Entity Collections as Tables and wrapping them in a DataSet and returning that.
So the reason you're returning a DataSet is because you're returning a DataSet? 
Is there an actual reason for doing that? I can't remember what a JSON-serialized DataSet looks like, but I can't imagine it's going to be easier to work with than an anonymous object containing the entities.
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Hi Rick,
I am able to return it to the front end using Web Api Get method. I am seeing the bunch of Collection of DataTables. But now I need another simple for you but not simple for me to write a code. Because I am not good at front end script buddy.
Can you please guide me a little bit in writing a code which can retrieve DataTables from Web Api return object and then bind it to Dropdown lists that I am having in my html?
Like for example if I have 3 tables (Department, Location and Supervisor) in my DataSet and that DataSet is returned to cshtml file, then I want to retrieve each of those tables and bind them to related Dropdownlists, if support I am using the same name as the table names for the Dropdowns.
Thanks,
Abdul Aleem
"There is already enough hatred in the world lets spread love, compassion and affection."
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As I said, it's much easier to consume the original entities from script, rather than trying to convert the entities to a DataSet on the server, and then having to jump through hoops to consume the data from script.
public object Get()
{
using (AppDevSecEntities ctx = new AppDevSecEntities())
{
return new
{
Departments = (from c in ctx.Departments orderby c.DepartmentName select c).ToList(),
FunctionalCategories = (from c in ctx.FunctionalCatagories orderby c.FunctionalCatagoryName select c).ToList(),
BusinessUnits = (from c in ctx.BusinessUnits orderby c.BusinessUnitName select c).ToList(),
Locations = (from c in ctx.Locations orderby c.LocationName select c).ToList(),
};
}
}
$.get("api/controller/Get").then(function(data){
var list = $("#Department");
var selectedValue = list.val();
list.empty();
$.each(data.Departments, function(index, department){
$("<option>").attr("value", department.ID).text(department.DepartmentName).appendTo(list);
});
list.val(selectedValue);
});
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Hi Rick, thank you very much as I am new to the MVC, so when I am calling the Web Api Action method, its going to go to the Controller Action and returning from there the Json but not returning to the html page, how should I work with Web API when I want to load the html, do I need to call the html and then call the web api methods or should I set up the Api Controller Action methods as start point and then redirect to my html page?
It is basic question but this is my first MVC (MVC Web Api) application, that's why I need help. Because in MVC applications the url would be controller action methods and then it will be binded to the cshtml file. But how can I do that in Web Api because by default the Action method is not going to html at all.
2. Another question is if I am calling API controller Get action method and redirecting to html page then, why should I call it again to load data, because I have written the returning of Data in the Get action method just like above.
Please help me in understanding this confusion a little bit. Thank you very much Rick.
Thanks,
Abdul Aleem
"There is already enough hatred in the world lets spread love, compassion and affection."
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You don't use WebAPI controllers to return HTML. You use them to load or change the raw data.
Your MVC controller returns an HTML view, which includes Javascript to make an AJAX request to the WebAPI controller. The WebAPI controller returns the raw data formatted as JSON, which your Javascript can then use to update the UI without having to reload the whole page.
You can also use your WebAPI from other types of applications - WPF, Windows Store apps, mobile apps, etc.
Getting Started with ASP.NET Web API 2 (C#) | Microsoft Docs[^]
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Thanks for clearing all doubts my friend, its hard to do the things if we have done Web-farms long time and then worked only on back-end and middle tier for a while. I am sure I will enjoy programming the MVC and Web Api my friend, thanks again.
Thanks,
Abdul Aleem
"There is already enough hatred in the world lets spread love, compassion and affection."
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hi to everyone
i need your help
i need to add GridView to a webpage using c#, without declare it in the page.aspx. is it possible?
i've tried in this way, but it never work
here the aspx
<asp:Content ID="Content1" ContentPlaceHolderID="MainContent" Runat="Server">
<section ID="normalElement" runat="server"></section>
<section ID="adminPanel" runat="server"></section>
<section ID="myC" runat="server"></section>
</asp:Content>
here the c#
GridView view = new GridView();
DataTable tbl = new DataTable();
DataColumn idCol = tbl.Columns.Add("COL_A");
idCol.DataType = System.Type.GetType("System.String");
DataColumn nameCol = tbl.Columns.Add("COL_B");
nameCol.DataType = System.Type.GetType("System.String");
DataColumn descrCol = tbl.Columns.Add("COL_C");
descrCol.DataType = System.Type.GetType("System.String");
DataColumn delCol = tbl.Columns.Add("COL_D");
delCol.DataType = System.Type.GetType("System.Boolean");
view.DataSource = tbl;
view.DataBind();
myC.Controls.Add(view);
but when i run the page, never appears on the page.
i've tried to add an empty row, but never change
so: is it possible doing what i'm trying to do?
thank you
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With your code, you have created the table tbl but you did not bind any data to it, those are columns you defined with no data so it will not be visible on the page.
Try something like below -
Have a place holder as below -
<asp:PlaceHolder ID="ph" runat="server" />
I am able to add the grid on page with below code.
protected void Page_Load(object sender, EventArgs e)
{
List<string> countrylist = new List<string>() { "India", "US" };
GridView grid = new GridView();
grid.AutoGenerateColumns = true;
grid.DataSource = countrylist;
grid.DataBind();
ph.Controls.Add(grid);
}
modified 20-Sep-20 21:01pm.
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<asp:Panel id="panel_left" runat="server" Visible="false">
<asp:UpdatePanel runat="server" ID="UpdatePanel1" UpdateMode="Conditional">
<Triggers>
<asp:AsyncPostBackTrigger ControlID="rdbGVRow" />
</Triggers>
<ContentTemplate>
<div class="row" style="padding-top:10px;">
<div class="col-md-12">
<div class="table-responsive" style="border: thin; overflow-y: hidden;">
<asp:GridView ID="grid_contact" runat="server" AutoGenerateColumns="False" DataKeyNames="C_ID"
OnRowDataBound="gv1_RowDataBound" OnPageIndexChanging="grid_contact_PageIndexChanging" AllowPaging="true" PageSize="10"
CssClass="table table-bordered table-hover" AutoPostBack="true" >
<HeaderStyle CssClass="table-bordered table-hover" Height="10px"/>
<PagerStyle cssClass="gridpager" HorizontalAlign="Center" />
<Columns>
<asp:TemplateField HeaderText="Detail" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:RadioButton ID="rdbGVRow" runat="server" OnCheckedChanged="radioChecked" AutoPostBack="true"/>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Name">
<ItemTemplate><%#Eval("NAME")%> <%#Eval("LNAME")%>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="C_ID" HeaderText="Contact Id" SortExpression="C_ID" />
<asp:BoundField DataField="TITLE" HeaderText="Job Title" SortExpression="JOB TITLE" />
<asp:BoundField DataField="Added_on" HeaderText="Added On" />
<asp:TemplateField HeaderText="Status">
<ItemTemplate><div class="label label-lg label-success"><%#Eval("STATUS")%> </div>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
</div>
</div>
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
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Did you face any error?
modified 20-Sep-20 21:01pm.
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Use this code,
protected void gv1_RowDataBound(object sender, GridViewRowEventArgs e)
{
Radiobuttonlb = e.Row.FindControl("rdbGVRow") as Radiobutton;
ScriptManager.GetCurrent(this).RegisterAsyncPostBackControl(lb);
}
also set
ClientIDMode="AutoID" for the Radiobutton
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I am looking for information about how to integrate asp.net core or mvc and angular2, any information I would appreciate, thanks
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Google will find you plenty.
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Always best to try your own searches before posting questions.
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The basics of .NET Core are, that this framework is highly extensible. There is nothing, by default in it. You add everything from scratch. Angular, Node.js, NPM etc. They are all added by the developers and you have to add them yourself as well.
There are however, templates provided, that you can use to create a new project.
Have a look here, Create an Angular 2 and .NET Core app that can be edited using Visual Studio 2017 - jonhilton.net, this provides a command that you can use to install extra packages and then utilize them in your projects by creating a new template-based project.
The sh*t I complain about
It's like there ain't a cloud in the sky and it's raining out - Eminem
~! Firewall !~
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Just wondering if anyone has had some luck with integrating lightSlider, bootstrap and MVC.
I wrote something from scratch that worked better, but had trouble overlaying navigation over the pictures, otherwise it resized correctly with phones and desktops.
So I decided to try lightSlider since Sputnik was using it. Seems well written, but I can't figure out how to resize the pictures for various devices.
It's too tall for desktop use and wanted to scale it down. On phones in portrait, I get full picture height but it overflows hidden; and landscape it's just too tall for the screen.
You can see what I have here
http://50.20.227.154/Portfolio/Viewer/0
Just poking around for insight.
If it ain't broke don't fix it
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Well I skipped over fixing the lightSlider and added the light-gallery to it. Then used my bower.json file to load both plugins automatically, and gulp to distribute the files correctly throughout the project. After getting all of that to work, I went back to doing research on the lightSlider and started going through a handful of tutorials.
Finally found this one
Js Tutorial - lightSlider - A lightweight touchable responsive Content slider
Which seemed to offer the best information on how to set it up.
So if all boiled down to the config file. So to save any one having the same trouble, here's a sample of what I used.
Still messing with the responsive properties to see how they work. Now that I have a stronger foundation, I can now build it out.
Overall, this lightSlider plugin is pretty slick, and the guy did a nice job writing it.
$(document).ready(function () {
$('#lightSlider').lightSlider({
item: 1,
autoWidth: false,
slideMove: 1,
slideMargin: 10,
addClass: '',
mode: "slide",
useCSS: true,
cssEasing: 'ease',
easing: 'linear',
speed: 400,
auto: false,
loop: false,
slideEndAnimation: true,
pause: 2000,
keyPress: false,
controls: true,
prevHtml: '',
nextHtml: '',
rtl: false,
adaptiveHeight: false,
vertical: false,
verticalHeight: 500,
vThumbWidth: 100,
thumbItem: 10,
pager: false,
gallery: true,
galleryMargin: 5,
thumbMargin: 5,
currentPagerPosition: 'middle',
enableTouch: true,
enableDrag: true,
freeMove: true,
swipeThreshold: 40,
responsive:
[
{ breakpoint: 1260, settings: { item: 2, thumbitem: 10, gallery: true, pager: true } },
{ breakpoint: 900, settings: { item: 2, thumbitem: 8, gallery: true, pager: true } },
{ breakpoint: 700, settings: { item: 1, thumbitem: 6, gallery: false, pager: true } },
{ breakpoint: 600, settings: { item: 1, thumbitem: 4, gallery: false, pager: true } }
],
onBeforeStart: function (el) { },
onSliderLoad: function (el) {
el.lightGallery({
selector: '#lightSlider .lslide',
subHtmlSelectorRelative: true
});
},
onBeforeSlide: function (el) { },
onAfterSlide: function (el) { },
onBeforeNextSlide: function (el) { },
onBeforePrevSlide: function (el) { }
});
});
If it ain't broke don't fix it
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im using grid view, i set page size to 10 record and also put search bar to search record, the problem is that when i search record it shows records that is about 30 on page change it is reset to the default rather then show record on page 2 related to my search
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You mean, you need to trim down the amount of results shown on the page?
Why are you selecting more than 10 records in the very first place? You should return only 10 records, on that page and then later on select the next 10 records, and so on.
You should also look at Pagination in ASP.NET, that will help you a lot in showing a better UX to the readers, who want to get something from your web application, read the following posts,
GridView Examples for ASP.NET 2.0: Paging and Sorting the GridView's Data
How To Implement Paging in GridView Control in ASP.NET
The sh*t I complain about
It's like there ain't a cloud in the sky and it's raining out - Eminem
~! Firewall !~
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