Comments by andres_fprado

andres_fprado 7-May-19 22:55pm View

This does not comply with the original question. The submitted program is expected to work with numbers up to 1000 digits long. Numbers that long can not be represented by any of the built-in numeric types (not even by decimal).

andres_fprado 9-Apr-16 1:18am View

Try with:
<td>@(item.purpose == null) ? "" : (item.purpose.protype_purpose_name ?? "")</td>

andres_fprado 9-Apr-16 1:10am View

Good luck! This is a little understood (and quite useful) operator in C#. I've used it in similar situations as the one you described. Hope it helps.

andres_fprado 9-Apr-16 1:05am View

You could do that with:

<td>@item.prototypecategory.prototype_category_name ?? "no" </td>

andres_fprado 9-Apr-16 0:59am View

No, you don't need the second <td></td> at all. You would just write:

<td>@item.prototypecategory.prototype_category_name ?? "" </td>

In Razor, the first <td> will always be emitted (written to the output). Then, the @ means to evaluate the C# expression and emit the result (which will be either the value of your variable, if not null, or an empty string otherwise). Finally, the closing </td> will always be emitted.

So, if the variable's value was "test", you would get <td>test</td>, and if it was null, you would simply get <td></td>.

andres_fprado 9-Apr-16 0:54am View

In Razor, what you enter after the "@" must be a valid C# expression. In this case, I'm proposing you use the "??" operator. This is a binary operator, which translates essentially as:

x = a ?? b

is equivalent to

if(a != null)
x = a;
else
x = b;

Therefore, you must have a valid C# expression after the ?? operator. For example, if you want the <td></td> to empty, you would put ?? "" after the expression you are evaluating (which means, 'if the expression is null, replace with an empty string).

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