Hey, ich benutze MVC3 mit Knockout und versuche Knockout-Bindungen zu verwenden, um hochgeladene Bilder in die Datenbank hochzuladen und zu speichern. Ich bin in der Lage, das Bild zu durchsuchen und zu erhalten, aber nicht, wie man dieses Bild speichert. Meine HTML-Ansicht ist:

<div data-bind="foreach: { data: images, beforeRemove: beforeRemoveSlot }">
        <div>
            <input type="file" accept="image/*" data-bind="file: imageFile, fileObjectURL: imageObjectURL, fileBinaryData: imageBinary"/>
            <div data-bind="if: imageObjectURL">
                <img class="thumb" data-bind="attr: { src: imageObjectURL }"/>
            </div>
            <div>Size: <span data-bind="text: fileSize"></span>&nbsp;bytes</div>
        </div>
    </div>
        <input type="submit" value="Upload Picture" data-bind="click: upload" />

Mein Ansichtsmodell ist:

var windowURL = window.URL || window.webkitURL;

ko.bindingHandlers.file = {
    init: function (element, valueAccessor) {
        $(element).change(function () {
            var file = this.files[0];
            if (ko.isObservable(valueAccessor())) {
                valueAccessor()(file);
            }
        });
    },

    update: function (element, valueAccessor, allBindingsAccessor) {
        var file = ko.utils.unwrapObservable(valueAccessor());
        var bindings = allBindingsAccessor();

        if (bindings.fileObjectURL && ko.isObservable(bindings.fileObjectURL)) {
            var oldUrl = bindings.fileObjectURL();
            if (oldUrl) {
                windowURL.revokeObjectURL(oldUrl);
            }
            bindings.fileObjectURL(file && windowURL.createObjectURL(file));
        }

        if (bindings.fileBinaryData && ko.isObservable(bindings.fileBinaryData)) {
            if (!file) {
                bindings.fileBinaryData(null);
            } else {
                var reader = new FileReader();
                reader.onload = function (e) {
                    bindings.fileBinaryData(e.target.result);
                };
                reader.readAsArrayBuffer(file);
            }
        }
    }
};

var imageUploadModel = function () {
    var self = {};

    var slotModel = function () {
        var that = {};

        that.imageFile = ko.observable();
        that.imageObjectURL = ko.observable();
        that.imageBinary = ko.observable();

        that.fileSize = ko.computed(function () {
            var file = this.imageFile();
            return file ? file.size : 0;
        }, that);

        that.firstBytes = ko.computed(function () {
            if (that.imageBinary()) {
                var buf = new Uint8Array(that.imageBinary());
                var bytes = [];
                for (var i = 0; i < Math.min(10, buf.length); ++i) {
                    bytes.push(buf[i]);
                }
                return '[' + bytes.join(', ') + ']';
            } else {
                return '';
            }
        }, that);

        return that;
    };

    self.beforeRemoveSlot = function (element, index, data) {
        if (data.imageObjectURL()) {
            windowURL.revokeObjectURL(data.imageObjectURL());
        }
        $(element).remove();
    };

    self.images = ko.observableArray([slotModel()]);

    self.addSlot = function () {
        self.images.push(slotModel());
    };

    self.removeSlot = function (data) {
        self.images.remove(data);
    };

    return self;
} ();

imageUploadModel.upload = function () {

}

$(document).ready(function () {
    ko.applyBindings(imageUploadModel);
});

Kann mir jemand vorschlagen, wie ich das Bild beim Hochladen speichern kann?