Recursive call to generic function with DataRow parameter - MakeGenericMethod Fails?

The reason for the error is because you are calling MyConvertDataRowToEntity(T item, string columnName, object rowValue) { var prefixColumn=columnName. IndexOf(". ")==-1?

ColumnName : columnName. Split(". ")0; var pi = typeof(T).

GetProperty(prefixColumn // Add your binding flags); // if pi==null then there is an error... if (column.ColumnName. IndexOf(". ") == (-1)) { // No Nesting pi.

SetValue(item,rowValue); return; } // Nesting var child=pi. GetValue(item); if (child==null) { // Logic here to get childs type and create an instance then call pi. SetValue with child } var remainder=string.

Join(',',columnName. Split(". ").

Skip(1).ToArray()); // make your generic method info for UpdateItemProperty with pi. PropertyType into mi mi. Invoke(null,new object { child,remainder,value }; }.

The reason for the error is because you are calling MyConvertDataRowToEntity but then passing in the getaccessor methodinfo for the property as the parameter instead of a data row containing only those fields. If you want to continue with the code processing logic you are currently using you would need to construct a new datarow containing the fields you wanted (with the prefix and ". ") removed from the start of the column names.

Alternatively you could create a helper method the accepted a column name, the source object and it simply updated the value. Static void UpdateItemProperty(T item, string columnName, object rowValue) { var prefixColumn=columnName. IndexOf(".")==-1?

ColumnName : columnName. Split(".")0; var pi = typeof(T). GetProperty(prefixColumn // Add your binding flags); // if pi==null then there is an error... if (column.ColumnName.

IndexOf(".") == (-1)) { // No Nesting pi. SetValue(item,rowValue); return; } // Nesting var child=pi. GetValue(item); if (child==null) { // Logic here to get childs type and create an instance then call pi.

SetValue with child } var remainder=string. Join(',',columnName. Split(".").

Skip(1).ToArray()); // make your generic method info for UpdateItemProperty with pi. PropertyType into mi mi. Invoke(null,new object { child,remainder,value }; }.

Thank you for the response. The problem is not the modification of the data , but sending the parameter through . I mean that when I invoke the method with childType I can't send the row through.It fails with : " 'System.Reflection.

RuntimeMethodInfo' cannot be converted to type 'System.Data. DataRow'." That's the trouble!

– Gregory Jul 24 at 4:40 The whole point of my response is that your invoke line is passing the method info for the property as a parameter and NOT a datarow which is what the method needs. Are you needing to invoke the getmethod first to get the return value? – Bob Vale Jul 24 at 11:19 Maybe I was not clear with my problem.

I have an hierarchical object with children . When I meet some property in my object that is Strongly Typed I'd like to perform MyConvertDataRowToEntity on that property recursively . I'll try out the datarow creation only of relevant columns and get back to you .

Thanks a lot for your help! – Gregory Jul 26 at 12:15.

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