Thursday 27 June 2013

Updating MVC view based on model updated in code

The following code increments a model property in MVC3 and updates the UI:

[HttpPost]
public ActionResult Edit(Movie model)
{
var temp = model.Age + 1;
ModelState.Remove("Age");
model.Age = temp;

if (ModelState.IsValid)
{
db.Entry(model).State = EntityState.Modified;

db.SaveChanges();
//return RedirectToAction("Index");
}
return View(moviedb2);
}

CellTemplateSelector

In the telerik grid, if you would like to create a custom layout based on data in the row then you can do the following:

image

Notice how the price of a swap contains two values.

public class Trade
{
public int Id { get; set; }
public DateTime DealDate { get; set; }
public decimal Price { get; set; }
public Type Type { get; set; }
public decimal Price2Leg { get; set; }
}

public enum Type
{
NotSet = 0,
Option,
Swap,
Forward
}

public class Trade
{
public int Id { get; set; }
public DateTime DealDate { get; set; }
public decimal Price { get; set; }
public Type Type { get; set; }
public decimal Price2Leg { get; set; }
}

public enum Type
{
NotSet = 0,
Option,
Swap,
Forward
}

public class TradePriceCellTemplateSelector : DataTemplateSelector
{
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
var trade = (Trade)item;

return trade.Type == Type.Swap ? this.SwapTemplate : this.NormalTemplate;
}

public DataTemplate SwapTemplate
{
get;
set;
}

public DataTemplate NormalTemplate
{
get;
set;
}
}

 

<UserControl x:Class="DataTemplates.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
xmlns:dataTemplates="clr-namespace:DataTemplates"
mc:Ignorable="d">

<UserControl.Resources>
<DataTemplate x:Key="NormalRow">
<StackPanel>
<TextBlock Text="{Binding Price}" />
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="SwapRow">
<StackPanel>
<TextBlock Text="{Binding Price}" />
<TextBlock Text="{Binding Price2Leg}" />
</StackPanel>
</DataTemplate>

<dataTemplates:TradePriceCellTemplateSelector x:Key="tradePriceCellTemplateSelector"
NormalTemplate="{StaticResource NormalRow}"
SwapTemplate="{StaticResource SwapRow}"/>
</UserControl.Resources>

<Grid x:Name="LayoutRoot" Background="White">

<telerik:RadGridView x:Name="TradeGrid"
RowDetailsVisibilityMode="Visible"
RowIndicatorVisibility="Collapsed"
GroupRenderMode="Flat"
Background="WhiteSmoke"
AutoGenerateColumns="False">
<telerik:RadGridView.Columns>
<telerik:GridViewDataColumn Header="DEAL ID / REF NO"
DataMemberBinding="{Binding Id}"/>

<telerik:GridViewDataColumn Header="DEAL DATE"
DataMemberBinding="{Binding DealDate, StringFormat='{}{0:dd.MM.yyyy}'}"/>

<telerik:GridViewDataColumn Header="TYPE"
DataMemberBinding="{Binding Type}"/>

<telerik:GridViewDataColumn Header="PRICE"
CellTemplateSelector="{StaticResource tradePriceCellTemplateSelector}" />
</telerik:RadGridView.Columns>
</telerik:RadGridView>
</Grid>
</UserControl>


Source:  https://github.com/stevenh77/DataTemplate/