How can I create a custom chart legend. Like this checkbox grid

I've seen Signature component and it's documentation but I haven't seen how to save the signature in DB.

Since there's no SignatureFor component to bind a model attribute to it, how to save a signature as a model attribute?

How can you set the default Zoom Level on the PDF Viewer?  It defaults to "Automatic Width" but I want it to default to "Fit to Width".

    <kendo-pdfviewer name="pdfviewer">
        <pdfjs-processing file="@(Url.Action("GetReportDownload", "Downloader"))"/>
        <toolbar enabled="true">
        </toolbar>
    </kendo-pdfviewer>

Hello,

im using kendo-react with .net core integration.

When i want to filter a Grid the query generated by the method: `toDataSourceRequest()`use the sql function LOWER to compare a string column.

With this behaviour its impossible to match only the exact rows. I want to disable this function and use the `=` operator in SQL.

I think if i use: `ignoreCase: false` in the frontend and then serialize with: `toDataSourceRequestString` from the `@progress/kendo-data-query` package, the `DataSourceRequest` will contain the ignoreCase prop and the toDataSourceRequest will do the job.

But the ignoreCase:false prop is not added to the query param,.

Any suggestion? Its not possible to use ignoreCase with the backend integration and only works in frontend?

- https://codesandbox.io/s/vigorous-bush-s2fgnc => ignore case working when the filter is in frontend.

- https://codesandbox.io/s/nervous-platform-9nr2q4 => with backend not working

Thanks!

When updating a record in the grid - it does not allow me to save an empty string for that field - if the previous value in the field contained a value.

My underlying class property doesn't work with either of the following options

with annotations:     

[Display(Name = "Comments")]
[Required(AllowEmptyStrings = true)]
public string ItemComments { get; set; } = " ";

Without annotations:

public string ItemComments { get; set; } = " ";

I have grid and form, which are bound to Employee object. It has object property Department. To edit it, I use separate editors, because I didn't find the right format to allow editing in both places.

Usage in form:

i.Add().Field(e => e.DepartmentId).Label("Отдел").EditorTemplateView(Html.Partial("FormEditors/Department"));

Editor of the form's field:

@(Html.Kendo().DropDownList()
    .Name("DepartmentId")
    .DataTextField("Name")
    .DataValueField("Id")
    .Filter(FilterType.Contains)
    .DataSource(source =>
    {
        source.Read(read => read.Action("GetDepartments", "Home"));
    }))

Usage in grid:

        columns.Bound(p => p.Department.Name).Width(230)
            .ClientTemplate("#=data.Department?.Name ?? ''#")
            .EditorTemplateName("Department")
            .Filterable(ftb => ftb.Cell(cell =>
            {
                cell.Operator("startswith");
                cell.ShowOperators(false);
            }));

Editor of the grid's column:

@(Html.Kendo().DropDownListFor(m => m)
    .DataTextField("Name")
    .DataValueField("Id")
    .Filter(FilterType.Contains)
    .HtmlAttributes(new { data_bind = "value: Department" })
    .DataSource(source =>
    {
        source.Read(read =>
        {
            read.Action("GetDepartments", "Home");
        });
    }))

Hi there,

While working with the Filter Component I was able to export an CompositeFilterDescriptor object on the client side before sending it to the server, the backend is a .net core API.

Unfortunately I tried to use Telerik.Datasource DLL in order to utilize the JSON parsing functionality inside however it seems like they are from two different worlds !

On the Angular side the CompositeFilterDescriptor looks like this 

{
    "logic": "or", 
    "filters": [ 
       {
           "field" : "unitId",
           "operator" : "eq", 
            "value" : "1005"
       }
     ]
}

On the .NET side the CompositeFilterDescriptor it is expecting something like this

{
  "logicalOperator": 1,
  "filterDescriptors": [
      {
        "member": "unitId", 
        "operator": 2 , 
        "value" : "1005"
      }
  ]
}

Summary of Differences

1- Field names are different and hence not parsed properly ( i.e. logicalOperator vs logic, member vs field)

2- Enumerations are sent as strings from Angular but parsed as Integers from Telerik.Datasource 

I feel a little bit confused here, is there any library provided by Telerik that I can use to capture the Angular CompositeFilterDescriptor JSON Object received from the client app inside a Web API ?

I use a DropDownList as an EditorTemplate in a Grid.

The problem is, that the DDL has to display several thousand entries (products).

I tried to set the PageSize of the DataSource and handle the Filter-Event. This works fine so far.  The DDL opens very fast and I can search (filter) and then select an entry, that is not visible in the list at the beginning.

This works fine for adding a new record.

But when I want to edit an existing record in the grid I get problems. When the editor opens and the value is not in the select list of the DDL, it is not selected (also not displayed) and the value of the DDL is set to null.

This behavior makes sense to me.

When I remove the PageSize from the DataSource everythings works fine. But it takes to long to open the DDL. That's why I need another solution.

I also tried the virtualization. But the problem stays the same.

Does anyone have an idea how I can solve this?

Maybe another control? Finally the user should be able to search and select a product on an easy way.

I am grateful for any idea.