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Serverfiltering (asp.net MVC versus Javascript)

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DropDownList
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NS
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NS asked on 21 Mar 2018, 04:04 PM

Hi,

If I use Serverfiltering on the ASP.NET MVC dropdownlist control, my controller method is called with a string text parameter. (the text parameter contains the text that the user is typing on the dropdownlist)

If use serverfiltering on the HTML5/Javascript dropdownlist control, the text parameter is null.

If I look at it with developer tools in Chrome, there is a long querystring added that looks like this: Home/GetPurchasingOrganisations?filter%5Bfilters%5D%5B0%5D%5Bvalue%5D=test&filter%5Bfilters%5D%5B0%5D%5Bfield%5D=Value&filter%5Bfilters%5D%5B0%5D%5Boperator%5D=startswith&filter%5Bfilters%5D%5B0%5D%5BignoreCase%5D=true&filter%5Blogic%5D=and

 

How do I get the filter value out of this querystring in my controller?

Thanks,

Nicolas

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NS
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answered on 22 Mar 2018, 10:15 AM
I solved it by reading out Request.QueryString["filter[filters][0][value]"]
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Dimitar
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answered on 23 Mar 2018, 12:08 PM
Hello Nicolas,

You have found the correct approach to pass the filter data to the server with the jQuery version of the DropDownList. The dataSource's tansport.read.data() method can be used to send the additional parameter to the server. Here is an alternative approach to get the filter:
<script>
$(document).ready(function () {
$("#news").kendoDropDownList({
filter: "contains",
dataTextField: "Name",
dataValueField: "Value",
dataSource: {                   
serverFiltering: true,
transport: {
read: {
url: "/ComboBox/GetNews",
data: function() {
var ddl = $("#news").getKendoDropDownList();
 
return {
text: ddl.filterInput.val()
}
                         
}
}
}
}
});
});
</script>

Regards,
Dimitar
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NS
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