Carpool Project: Part #10

I went back to the update of the Carpool Controller and changed the view to include the Driver like so:


I then updated the driverId to see if the changes propagate. The new value is in the form collection:


But after running UpdateView(), the new value is dropped.


Apparently, only the top-level properities are affected by UpdateView? Ugh – between the date/time conflict the nested properties, UpdateView only is useful for the most basic scenarios. I’ll replace UpdateView with a method that I write.

I thought about using Reflection like so (this is not right):

1 private void UpdateCarpoolFromFormCollection(Carpool.Domain.Carpool carpool, FormCollection collection) 2 { 3 4 PropertyInfo[] propertyInfos = carpool.GetType().GetProperties(); 5 foreach (PropertyInfo propertyInfo in propertyInfos) 6 { 7 for (int i = 0; i < collection.Count; i++) 8 { 9 if (propertyInfo.Name == collection[i].ToString()) 10 { 11 propertyInfo.SetValue(carpool,collection[i],null); 12 } 13 } 14 } 15 16 } 17  

I realized I really don’t understand the FormCollection object and how to enumation (or write some LINQ) to pull the correct value out of it. I then realized that I am being stupid. Of course the MVC creators would allow for next properities. I wrote a quick hello world app and sure enough, the changes are coming down:


The difference is the “.”. In my carpool solution, the Carpool.Drver is somehow turning into CarpoolDriver:


Changing this

1 <div class="editor-label"> 2 <%: Html.LabelFor(model => model.Driver.Id) %> 3 </div> 4 <div class="editor-field"> 5 <%= Html.TextBox("carpoolDriverId", Model.Driver.Id)%> 6 <%: Html.ValidationMessageFor(model => Model.Driver.Id)%> 7 </div> 8  

To This

1 2 <div class="editor-label"> 3 <%: Html.LabelFor(model => model.Driver.Id) %> 4 </div> 5 <div class="editor-field"> 6 <%: Html.TextBoxFor(model => model.Driver.Id)%> 7 <%: Html.ValidationMessageFor(model => model.Driver.Id)%> 8 </div> 9  


And boom goes the dynamite…

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