CRUD : Problem on Update function

Hi,

I am designing simple application in that i applied all CRUD function. Create Read Delete functions are working nut in Update it is not working

onUpdate: function() {

var that = this;

var oDialog = new sap.m.Dialog({

title: "Update Product",

content: [

/*new sap.m.Label({

text: "Product ID"

}),

new sap.m.Input(),*/

new sap.m.Label({

text: "Product Name"

}),

new sap.m.Input(),

],

endButton: new sap.m.Button({

text: "Close",

press: function() {

oDialog.close();

}

}),

beginButton: new sap.m.Button({

text: "Save",

press: function() {

var udata = {

Name: this.getParent().getContent()[3].getValue(),

};

var myDialog = this.getParent();

that.getView().getModel().update("/ProductSet('"+ udata +"')", udata, {

success: function() {

sap.m.MessageToast.show("Product Update Successfully");

myDialog.close();

},

error: function() {

sap.m.MessageToast.show("Error Occur");

}

});

}

}),

});

oDialog.open();

}

i am getting issue on Name: this.getParent().getContent()[3].getValue(),

please tell me how to rectify that error