Reflection PropertyInfo.GetValue(object) throwing DBNull Exception

Reflection PropertyInfo.GetValue(object) throwing DBNull Exception

By : user2955464
Date : November 22 2020, 10:40 AM
This might help you I am having a difficult time with what should be a simple bit of code. The code below loops through the properties of a custom class and gets the value from that class object and stuffs it in the data row. , You can check for null or just use null-coalescing operator:
code :
 row[p.Name] = p.GetValue(sfa) ?? DBNull.Value;

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Reflection PropertyInfo.GetValue from Collection

Reflection PropertyInfo.GetValue from Collection

By : user2210228
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I have problem with reflection, dynamic invoking objects and reading collection values. , Have you tried get_Item ?
code :
object oICollection = sthGetCollectionMethod.Invoke(
    sthInstance, BindingFlags.Instance | BindingFlags.Public, null,
    new object[1] { "parameter" },

object obj = tICollection.GetMethod("get_Item").Invoke(
    oICollection, new object[] { "id='1'" } );
PropertyInfo GetValue throwing error during recursion

PropertyInfo GetValue throwing error during recursion

By : Moshe
Date : March 29 2020, 07:55 AM
help you fix your problem Why are you drilling down on the type, instead of the instance?
Specifically here:
code :
  object o = pinfo.PropertyType;
  var o = pinfo.GetValue(obj, null);
PropertyInfo.GetValue(object obj, object[] index) throwing 'Target' exception

PropertyInfo.GetValue(object obj, object[] index) throwing 'Target' exception

By : Akzhol Imangaliyev
Date : March 29 2020, 07:55 AM
I hope this helps you . I need a generic list with extended search mechanism, so i have created a generic list (base List) with an addirional indexer. So in this, if T is an object, then the list allows to fetch the item based on a field. Here is the Sample code , This line of code will need to be something like this...
code :
object l_obj = l_objPropertyInfo.GetValue("Name", null);
object l_obj = l_objPropertyInfo.GetValue(this[l_nIndex], null);
PropertyInfo.GetValue(object) fails with IEnumerable<T> [C#, Reflection]

PropertyInfo.GetValue(object) fails with IEnumerable<T> [C#, Reflection]

By : user3176554
Date : March 29 2020, 07:55 AM
wish helps you This has nothing to do with the type implementing IEnumerable. Rather it's about the type having an indexer. Indexers are considered properties, but they're special properties that need to be given the parameter of the index when getting their value. If you don't, it errors as you're seeing here.
You can use GetIndexParameters() and check the count of the returned array to determine if the property is an indexer. This will let you either skip that property (which is what I assume you'll want to do here), or use it to get its values.
Reflection PropertyInfo.GetValue

Reflection PropertyInfo.GetValue

By : koala428
Date : March 29 2020, 07:55 AM
With these it helps I am new to using reflection in C#. Any help is much appreciated. , You should be able to check for 'Null' directly as follows
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