Databases
StackOverflow2013
Postsdbo
PO
 

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    <p>Here's my solution - a <code>RemoveFor()</code> extension method on <code>ModelState</code>, modelled after MVC HTML helpers:</p> <pre><code> public static void RemoveFor&lt;TModel&gt;(this ModelStateDictionary modelState, Expression&lt;Func&lt;TModel, object&gt;&gt; expression) { string expressionText = ExpressionHelper.GetExpressionText(expression); foreach (var ms in modelState.ToArray()) { if (ms.Key.StartsWith(expressionText + ".")) { modelState.Remove(ms); } } } </code></pre> <p>Here's how it's used :</p> <pre><code>if (model.CheckoutModel.ShipToBillingAddress == true) { // COPY BILLING ADDRESS --&gt; SHIPPING ADDRESS ShoppingCart.ShippingAddress = ShoppingCart.BillingAddress; // REMOVE MODELSTATE ERRORS FOR SHIPPING ADDRESS ModelState.RemoveFor&lt;SinglePageStoreModel&gt;(x =&gt; x.CheckoutModel.ShippingAddress); } if (ModelState.IsValid) { // should get here now provided billing address is valid } </code></pre> <p>If anybody can see a way to improve it (or not have to specify the generic type argument) then please let me know. Or if this exists in MvcFutures under a different name I'd rather switch to that.</p> <p>While I'm at it here's a helper to check if ModelState is valid for a certain 'tree'</p> <pre><code> public static bool IsValidFor&lt;TModel, TProperty&gt;(this TModel model, System.Linq.Expressions.Expression&lt;Func&lt;TModel, TProperty&gt;&gt; expression, ModelStateDictionary modelState) { string name = ExpressionHelper.GetExpressionText(expression); return modelState.IsValidField(name); } </code></pre> <p>Which can be used like this :</p> <pre><code> if (model.IsValidFor(x =&gt; x.CheckoutModel.BillingAddress, ModelState)) { _debugLogger.Log("Billing Address Valid", () =&gt; ShoppingCart.BillingAddress); } </code></pre>
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    1. POIs there a strongly-named way to remove ModelState errors in ASP.NET MVC
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    1. COYou can specify the model type in the expression rather than via the generic argument if you like your brackets round rather than pointy: ModelState.RemoveFor((SinglePageStoreModel x) => x.CheckoutModel.ShippingAddress);
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      1. USDan Malcolm
 

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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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