I am calling a APi using Flurl.http that contains Value and Text field.
I am using that api in Picker !
async void method()
{
string url = "http://xxx.xxx.xxx.xx/api/QMSRejection/GetShiftMaster";
IList<dynamic> list = await url.GetJsonListAsync();
var modelList = new List<string>();
foreach (var item in list)
{
modelList.Add(item.Text);
}
ShiftPicker.ItemsSource = modelList;
}
this is json response api provides
{"Value":"SF2017-1","Text":"General Shift Head Office"},{"Value":"SF2017-2","Text":"Shift-A-1 (Day)"},{"Value":"SF2017-3","Text":"Shift-B-1 (Night)"},{"Value":"SF2017-4","Text":"Shift-C"},{"Value":"SF2017-5","Text":"Shift-9.00AM-6.00PM"},{"Value":"SF201711","Text":"Morning Shift (6.00 Am-3.00Pm)"},{"Value":"SF20171203","Text":"Shift 6:30AM to 3:00PM"},{"Value":"SF2018-1","Text":"General Shift Factory-1"},{"Value":"SF20182","Text":"Shift 10AM to 8PM"},{"Value":"SF20191","Text":"General Shift Factory-2"},{"Value":"SF20192","Text":"Shift 7:00AM to 4:00PM"},{"Value":"SF20193","Text":"Shift-A-2 (Day)"},{"Value":"SF20194","Text":"Shift-B-2 (Night)"}]
I am getting data correctly and I am able to fetch selected Item as well but issue is that I have added only text field but I need access of Value Field as well !
Right now When I have to pass selected value of dropdown, I only have text and I need associated value field with it too so I can use it!
I will display only text but I need access of it !
as #Iria suggested, first define a model class for your data
public class MyClass{
public string Value{get;set;}
public string Text{get;set}
}
then tell flurl to return a strongly typed class instead of using dynamic
var data = await url.GetJsonAsync<List<MyClass>>();
then you can bind your picker directly to data
ShiftPicker.ItemsSource = data;
I would do the following:
var results = await url.GetJsonListAsync();
var myClass = JsonSerializer.Deserialize<IEnumerable<MyClass>>(results);
Then
public class MyClass{
public string Value{get;set;}
public string Text{get;set}
}
in myClass you have a collection of objects that have Value and Text, then you have the correspondance between value and Text for each object
Related
I have a requirement where when a user clicks on image a list should be shown with checkboxes and all the categories that is present in DB and user should be able to select the checkboxes. How can this be achieved using asp:repeater control? the caegory is a enum type and can have n number of values. In repeater i have added a checkbox and a label; the label should display the category text.
To start with, you should add the [Description] attribute to each value in your Enum. This allows you to set proper descriptive text for each value. This attribute is in System.ComponentModel, here's an example: -
public enum CalendarShowAsEnum
{
[Description("None")]
None = 10,
[Description("Busy")]
Busy = 20,
[Description("Out Of Office")]
OutOfOffice = 30,
[Description("On Holiday")]
OnHoliday = 40
}
You then need 2 functions: -
One function that takes an Enum type and a ListBox/DropDown as parameters, and adds an entry for each Enum into the list
A helper function that converts the enum into the descriptive title you gave them (example above)
The List function might look as follows (all this is taken from a project I worked on): -
public static void BindNamedEnumList(ListControl list,
Type enumerationType)
{
list.Items.Clear();
Array array = Enum.GetValues(enumerationType);
ListItem item;
string name;
var enumerator = array.GetEnumerator();
if (enumerator != null)
{
while (enumerator.MoveNext())
{
Enum value = enumerator.Current as Enum;
name = EnumHelper.GetEnumName(value);
item = new ListItem(name);
item.Value = Convert.ToInt32(value).ToString();
list.Items.Add(item);
}
}
}
This function takes a Type and a ListControl (which ListBox and DropDownList both inherit from). The Type is the .GetType() of the enum you want to add to the list. Note that it doesn't select any values and that it does depend on each enum value having a defined integer value. The latter part will help you with selecting individual items.
Note the loop calls EnumHelper.GetEnumName(value) - this is the helper function that uses the Description attribute I mentioned at the start. This function looks like: -
public static string GetEnumName(object value)
{
string retVal = string.Empty;
try
{
FieldInfo fieldInfo = value.GetType().GetField(value.ToString());
DescriptionAttribute[] attributes = (DescriptionAttribute[])fieldInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
retVal = ((attributes.Length != 0) ? attributes[0].Description : value.ToString());
}
catch (System.NullReferenceException)
{
}
finally
{
if (string.IsNullOrEmpty(retVal))
{
retVal = "Unknown";
}
}
return retVal;
}
It uses reflection, so you'll need to add an Imports for System.Reflection
To use the list function to bind a set of Enum values to the list, simply call
{HelperClass}.BindNamedEnumList(myListBox, typeof({MyEnumType})
As a part of online shopping, I implemented a cart using Session.
I have implemented the Cart in the following manner :
Session[pname] = qty;
where pname is a string variable which holds the name of the product and I used that as the key. qty is an integer variable which holds the number of items of that particular product.
To display the cart items I simply used the following loop :
foreach(string keys in Session.Keys)
Through this I get the names of the products along with the associated quantity and using this I display the cart items. The problem arises when I also have a session for the user active on the same page.
Session["uname"] = user_name;
And while retrieving the keys using Session.Keys, the uname gets included which I don't want as I need only the product's names. Is there any way I can read the keys from Session[pname] without reading from Session["uname"]?
Instead of storing an object in session for each product and quantity, just store a single object (e.g. List) which contains all of your cart items.
Here is an example which you could tweak to meet your needs:
First, a simple object to store the data:
public class CartItem {
public string Name { get; set; }
public int Quantity { get; set; }
}
Then if you need to add an object to the cart list:
var cartItems = new List<CartItem>();
cartItems.Add(new CartItem() {
Name = "",
Quantity = 1
});
Session["Cart"] = cartItems;
//Need to fetch the cart items later on?
cartItems = (List<CartItem>)Session["Cart"];
Obviously this can be implemented differently and this was just a quick example.
You mentioned needing an easier fix than what Justin Helgerson said, so here's a couple of suggestions, but they feel a little quick and dirty. Justin's is probably the superior solution. I used a quick Console app to demonstrate this, so place your constants where they belong, and you obviously don't have to create a dictionary.
const string USERSESSION = "uname";
Dictionary<string, object> session = new Dictionary<string, object>();
session["item1"] = 2;
session["item2"] = 1;
session[USERSESSION] = "StackOverflowUser";
// print cart items - minus the user name session key
foreach (string key in session.Keys.Where(s => s != USERSESSION))
{
Console.WriteLine("Key: {0} Value: {1}", key, session[key]);
}
Alternatively, if you plan on there being more keys than just "uname", use the Linq Except method.
// build up except set
List<string> exceptKeys = new List<string>
{
USERSESSION
};
foreach (string key in session.Keys.Except(exceptKeys))
{
Console.WriteLine("Key: {0} Value: {1}", key, session[key]);
}
The Goal is to have a list of options (that a user can chose through radio buttons) in one place(for eg: a yaml config file). No other place should have this list hard-coded
I've done something similar to create select elements, and I think enums worked just fine. Doing radio buttons should be very similar. I've set it up so that the labels can be defined in the messages file. I'm going to try to excerpt the relevant portions from my larger auto-form-generation code (using FastTags) the best I can. It's a bit heavy for this one case but it makes sense in the larger system.
I use the tag like #{form.selector 'order.status' /}, which looks find the variable named order in the template, sees that status is declared as public Status status, and then goes to find all the values of the Status enum and generate options for them in the select element.
First, I use a FieldContext object which just contains a bunch of info that's used by the other code to determine what to generate along with some utility methods:
public class FieldContext {
public final Map<?,?> args;
public final ExecutableTemplate template;
public final int fromLine;
public Class clazz = null;
public Field field = null;
public Object object = null;
public Object value = null;
private Map<String,String> attrs = new HashMap<String,String>();
private Map<String,Boolean> printed = new HashMap<String,Boolean>();
private List<Option> options;
...
Then I have this in another helper class (its info gets added to the FieldContext):
public List<Option> determineOptions(FieldContext context) {
List<Option> options = new ArrayList<Option>();
if (context.field.getType().isEnum()) {
for (Object option : context.field.getType().getEnumConstants()) {
options.add(new Option(option.toString(), Message.get(option.toString())));
}
}
return options;
}
then the tag declaration is
public static void _selector(Map<?,?> args, Closure body, PrintWriter out, ExecutableTemplate template, int fromLine) {
String field_name = args.get("arg").toString();
TagContext.current().data.put("name", field_name);
SelectHelper helper = HelperFactory.getHelper(SelectHelper.class);
try {
FieldContext context = new FieldContext(field_name, args, template, fromLine);
helper.autoconfigure(context);
TagContext.current().data.put("selected", helper.determineValue(context));
out.print("<div class=\"formutil-field formutil-selector\">");
out.print("<label for=\"" + context.getAttr("id") + "\">");
out.print(helper.findOrCreateLabel(context));
out.print("</label>");
out.print("<select");
context.printAttribute(out, "id", "name");
out.print(">");
if (context.hasOptions()) {
for (Option option : context.getOptions()) {
out.print("<option value=\"" + option.value + "\">" + option.label + "</option>");
}
}
out.print("</select>");
context.printErrorIfPresent(out);
context.printValidationHints(out);
out.println("</div>");
}
...
}
I am trying to pass a variable from a method in my Controller to a method in a Model. Since the method in the Model takes one argument (which was designed earlier), I cannot pass my variable as an argument to the method in the Model. And also, the method in this Model is called by other controllers too, so if I change the argument, I have to change all the controllers too, which would be a tedious task.
What I have been trying so far is- I created one MyVariableClass and declared a property. Then I instantiated that class and set the property string to the variable that I wanted to pass. Now, in my Model's method, I instantiated the same MyVariableClass again, but when I did that, the value of the variable was set to null. The code I have right now is -
public ActionResult ItemInformation( string id)
{
//Pass a string to MyVariable
MyVariableVClass params = new MyVariableClass();
params.myVariable = "abc";
//This is what My Model is taking as an argument(id), and I don't want to
//pass mYvariable along with that argument because it will break other controllers
// too which calls this method
var itemInformation = _repository.GetItemInformation(id);
return View(itemInformation);
}
and MyVariableClass
public class MyVariableClass
{
public string myVariable { get; set; }
}
and the method in My Model
public IList<Items> GetItemInformation(string itemId)
{
MyVariableClass webType = new MyVariableClass();
var _params = webType.myVariable;
//Check this variable and perform database query
if (_params =="this")
{
var query = myFirstQuery;
}
else
{
var query = mySecondQuery;
}
//return ....
}
Anybody has solution to this? Thanks in Advance!
Any reason why subclassing your model and overriding the GetItemInformation method wouldn't work? Or, even easier, why not just overload the GetItemInformation method with one that takes two strings? Your other controllers can still use the one that only takes a single string.
public IList<Items> GetItemInformation(string itemId, MyVariableClass webType)
{
var _params = webType.myVariable;
//Check this variable and perform database query
if (_params == "this")
{
var query = myFirstQuery;
}
else
{
var query = mySecondQuery;
}
//return ....
}
public IList<Items> GetItemInformation(string itemId)
{
MyVariableClass fauxType = new MyVariableClass();
fauxType.myVariable = "not this";
return GetItemInformation(itemId, fauxType);
}
Try using session variable.
I have two questions regarding the Flex combo box.
The string representing the function name will be read from xml # run time.
var combo:ComboBox = new ComboBox();
combo.labelFunction = "functionName";
How can I achieve this?
So the first name, which is to be displayed in the combo box, can be only retrieved by accessing another DTO, called person and then its first name.
var combo:ComboBox = new ComboBox();
combo.labelField= "person.firstName";
My class looks like this,
public class Test
{
public var person:PersonDTO;
}
public class PersonDTO
{
public var firstName:String;
}
Is it possible to access any multi-level text using the combo box label field ?
You need to pass the function not the name.
Doing this
combo.labelFunction = "functionName";
Is passing a string.
The only work around I can think of is to make a switch statement with one case for each function you may have. Then call that with "case" from within your xml.
switch( xml.#labelfunction ){
case 'func1':
combo.labelFunction = this.func1;
break;
case 'func2':
combo.labelFunction = this.func2;
break;
}
Its hacky but should work.
ad 1) labelFunction
Calling functions when you know only the name as String is quite easy. The following snippets shows how you can execute a function that is a member of the same class. In case you need to call a function from another class replace this with the according variable name.
private function comboBox_labelFunction(item:Object):String
{
var functionName:String = myXml.#labelFunctionName;
return this[functionName](item);
}
ad 2) labelField
It's normally not possible to use "person.firstName" as labelField. However, you should be able use it within your labelFunction. Something like this should work...
private function comboBox_labelFunction(item:Object):String
{
var labelField:String = "person.firstName";
var attributeNames:Array = labelField.split(".");
for each (var attributeName:String in attributeNames)
{
if (item && item.hasOwnProperty(attributeName))
item = item[attributeName];
else
return null;
}
return item;
}