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Hello,
i create a hosted Blazor Wasm with VS2022 and Net 6.x.
On the Client i use SfGrid (Version 20.2.0.36) with TValue and sfDataManager and the
<GridEditSettings AllowAdding="true" AllowDeleting="true" AllowEditing="true" Mode="EditMode.Dialog">
All is running ok.
But when i try to customize the edit dialog with 'template' i got some errors.
Do you have samples that use remote data via sfDataManager and Adaptors.UrlAdaptor?
All samples i found use local data and a propertie called 'DataSource' that i don't use.
Thanks
Patric
.
Hi Patric,
Greetings from Syncfusion support.
We are currently Validating the reported query at our end, and we will update the further details within two business days. Until then we appreciate your patience.
Regards,
Sarveswaran PK
Hi Patric,
Sorry for the delay.
We have analyzed your query and prepared Adaptors.UrlAdaptor sample for handling CRUD operation in the oldest version sample. We have facing some complexities while converting into latest version. We’ll prepare and update the latest version sample within two business days.
Until then we appreciate your patience
Regards,
Sarveswaran PK
Hi Sarveswaran,
thanks for your suport. I take a look in your old sample and wait for your new one.
This is my first Blazor Wasm with .Net 6 and VS2022 and i think there are some bugs in the whole environement. Especaly scaffolding makes big trouble (crashes with useless error mesages). And the joke, if i do the same thing with .Net 5 and VS 2019 it simply works perfect.
Again thanks for your support
Patric
Hi Patric,
Sorry for the delay and inconvenience caused.
We’re facing some complexities while preparing a sample. Kindly share the what kind of issue you’re facing while making scaffolding sample, share issue reproducible sample to us and video demo of an issue to us. It’ll be more helpful for us to validate the query and provide the solution as early as possible.
Regards,
Sarveswaran PK
Hi Sarveswaran,
the example from your last post was not very useful. I create the datagrid and the contoler via Syncfusion Scaffolding as described in this document (https://help.syncfusion.com/extension/blazor-extension/visual-studio/scaffolding).
This tool is very helpful!! But it generat the following structure:
<SfGrid ID="Grid" TValue="TZeittät" Height="100%" AllowSorting="true" AllowGrouping="true" AllowPaging="true" Toolbar="@(new List<string>() { "Search", "Add", "Edit","Update","Delete","Cancel" })" AllowFiltering="true" AllowSelection="true" ShowColumnMenu="true">
<SfDataManager Url="/api/TZeit_DataGrid" InsertUrl="/api/TZeit_DataGrid/Insert" UpdateUrl="/api/TZeit_DataGrid/UpdateTZeittät" RemoveUrl="/api/TZeit_DataGrid/DeleteTZeittät" Adaptor="Adaptors.UrlAdaptor" ></SfDataManager>
I think that TValue is like the Datasource; so with this code i can fix this problem:
<GridEditSettings AllowAdding="true" AllowDeleting="true" AllowEditing="true" Mode="EditMode.Dialog">
<Template>
@{var Zeit = (context as TZeittät);
<div>
<div class="form-row">
<div class="form-group col-md-6">
<label class="e-float-text e-label-top">Aktivitäts-ID</label>
<SfNumericTextBox ID="OrderID" @bind-Value="@(Zeit.ZeiterfRefnr)" Enabled="@((Zeit.ZeiterfRefnr == null) ? true : false)"></SfNumericTextBox>
</div>
<div class="form-group col-md-6">
<label class="e-float-text e-label-top">Datum </label>
<SfDatePicker ID="Datum" @bind-Value="@(Zeit.Datum)"></SfDatePicker>
</div>
</div> ...
But i get an error that ' context' from (context as TZeittät) is not available! But if i run the app, it works and i don't know why.
So can you explain this??
And i found an other problem with the generated controler. It create the DBSet like:
public class TZeit_DataGridController : ControllerBase
{
private readonly MyAdminoContext db;
public TZeit_DataGridController(MyAdminoContext context)
{
db = context;
}
public DbSet<TZeittät> GetAllTZeittät()
{
try
{
return db.TZeittät;
}
catch
{
throw;
}
}
that is later used in:
// POST api/<controller>
[HttpPost]
[Route("api/[controller]")]
public Object Post([FromBody]DataManagerRequest dm)
{
IEnumerable DataSource = GetAllTZeittät().ToList();
....
My question: Where is the best place to inject a static 'where-condition' in the DBSet?
As far as i understand, if the statement ' DataSource = GetAllTZeittät() ...' is executed, the call to the database is executed and collect the whole table!
But if i place a where condition in the DBSet like '
return db.TZeittät.Where(x => x.Mandantrefnr == 123);' the result can not cast in a DBSet.Entity!
Any idea how to fix this??
Thanks Patric
Hi Patric,
Greetings from Syncfusion support.
We are currently Validating the reported query at our end, and we will update the further details within two business days. Until then we appreciate your patience.
Regards,
Sarveswaran PK
Hi Patric,
Sorry for the delay,
Based on your update, We suspect that, you want to initially filter the DD. For Grid, to apply the initial filtering, set the filter Predicate object in Columns property of GridFilterSettings component. For, we suggest you to get values using ToList method in the Where condition. Kindly refer the attached code snippet and documentation for your reference.
Reference: https://blazor.syncfusion.com/documentation/datagrid/filtering#initial-filter
|
return db.TZeittät.Where(x => x.Mandantrefnr == 123).ToList(); |
Regards,
Sarvesh
Hi Sarvesh,
thanks for your reply; i found a similar solution.
I think it is necessary to identify the 3 parts of my solution and where the action happens.
First: If i 'reverse engineer' the tables of my database with EF Power Tools, the entyties are stored in the .server project but to use them in the client, i moved them to the .shared project (with the change of the namespaces).
Next i create the Controller in the .server project based on your sample with this fragment:
using Admino_Client.Shared.Models;
using Admino_Client.Server.Data;
using Admino_Client.Server.Models;
using Syncfusion.Blazor.Data;
using Microsoft.Extensions.Hosting;
namespace Admino_Client.Server.Controllers
{
public class TMandanten_DataGridController : ControllerBase
{
private readonly MyAdminoContext db;
public TMandanten_DataGridController(MyAdminoContext context)
{
db = context;
}
public List<TMandanten> GetMandantTMandanten()
{
try
{
#pragma warning disable CS8629 // Ein Werttyp, der NULL zulässt, kann NULL sein.
var data = from tz in db.TMandanten orderby tz.MandRefnr descending where ((tz.aktiv == true) && ((tz.ErfassungsUser == sPerson) || (tz.AktualisierungsUser == "Test"))) select tz;
#pragma warning disable CS8629 // Ein Werttyp, der NULL zulässt, kann NULL sein.
List<TMandanten> l = data.ToList();
return l;
}
catch
{
throw;
}
}
// POST api/<controller>
[HttpPost]
[Route("api/[controller]")]
public Object Post([FromBody]DataManagerRequest dm)
{
IEnumerable DataSource = GetMandantTMandanten();
if (dm.Search != null && dm.Search.Count > 0)
{
DataSource = DataOperations.PerformSearching(DataSource, dm.Search); //Search
}
if (dm.Sorted != null && dm.Sorted.Count > 0) //Sorting
{
DataSource = DataOperations.PerformSorting(DataSource, dm.Sorted);
}
if (dm.Where != null && dm.Where.Count > 0) //Filtering
{
DataSource = DataOperations.PerformFiltering(DataSource, dm.Where, dm.Where[0].Operator);
}
int count = DataSource.Cast<TMandanten>().Count();
if (dm.Skip != 0)
{
DataSource = DataOperations.PerformSkip(DataSource, dm.Skip); //Paging
}
if (dm.Take != 0)
{
DataSource = DataOperations.PerformTake(DataSource, dm.Take);
}
return dm.RequiresCounts ? new { result = DataSource, count = count } : DataSource as object;
}
.....}
Then in the razor page, i use
<SfDataManager Url="/api/TMandanten_DataGrid" InsertUrl="/api/TMandanten_DataGrid/Insert" UpdateUrl="/api/TMandanten_DataGrid/UpdateTMandanten" RemoveUrl="/api/TMandanten_DataGrid/DeleteTMandanten" Adaptor="Adaptors.UrlAdaptor" ></SfDataManager>
In addition i upgraded to SF Version 20.3.0.52 and the problems with the grid editing dialog are gone in part.
The two way databindig with the sfCheckbox is a bit tricky (it is allways @bind-Value="@(...)" but the checkbox work with Checked="@(...)"!!!!).
But i see a light at the end of the tunnel!! Since all kind of scaffolding mostly produce errors in my environment, i create the code for the grid with SQL-Statements like
SELECT '<GridColumn Field="' + c.Name + '" HeaderText="' + c.Name + case when c.is_identity = 1 then '" IsPrimaryKey="true" IsIdentity="true" Visible="false"></GridColumn>'
else case when ty.Name like 'date%' then '" Type="ColumnType.DateTime" Format="d" AutoFit="true"></GridColumn>'
when ty.Name like '%char%' then '" Type="ColumnType.String" ClipMode="ClipMode.EllipsisWithTooltip"></GridColumn>'
when ty.Name like '%int%' then '" Type="ColumnType.Number"></GridColumn>'
when ty.Name = 'bit' then '" Type="ColumnType.Boolean" DisplayAsCheckBox="true"></GridColumn>'
when ty.Name = 'float' then '" Format="C2" TextAlign="TextAlign.Right"></GridColumn>' end end,
COL_Bez = c.Name, Col_Nr = c.column_id, Col_Ident = c.is_identity, TypeName = ty.Name, MaxLength = c.max_length
FROM
sys.columns c
INNER JOIN
sys.tables t ON t.object_id = c.object_id
INNER JOIN
sys.types ty ON c.user_type_id = ty.user_type_id
where t.name = 'TMandanten';
Looks a little bit weird, but it do the job especially if the table has hundreds of columns.
Again, thanks for your support,
Patric
