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GeneralRe: casting from interface instance back to generic instance ? Pin
BillWoodruff24-Apr-20 2:41
mveBillWoodruff24-Apr-20 2:41 
GeneralRe: casting from interface instance back to generic instance ? Pin
Richard Deeming24-Apr-20 3:26
mveRichard Deeming24-Apr-20 3:26 
GeneralRe: casting from interface instance back to generic instance ? Pin
BillWoodruff24-Apr-20 4:52
mveBillWoodruff24-Apr-20 4:52 
GeneralRe: casting from interface instance back to generic instance ? Pin
Richard Deeming24-Apr-20 4:59
mveRichard Deeming24-Apr-20 4:59 
AnswerRe: casting from interface instance back to generic instance ? Pin
jschell26-Apr-20 9:59
Memberjschell26-Apr-20 9:59 
GeneralRe: During Pin
OriginalGriff23-Apr-20 3:15
mveOriginalGriff23-Apr-20 3:15 
QuestionRefreshing data on a parent form at child close Pin
Uranium-23521-Apr-20 20:24
MemberUranium-23521-Apr-20 20:24 
AnswerRe: Refreshing data on a parent form at child close Pin
OriginalGriff21-Apr-20 21:44
mveOriginalGriff21-Apr-20 21:44 
Your problem is to do with the way you display the child form: ShowDialog is a modal function: it does not return until the form it displays is closed. So the UI for Form1 is "busy" and doesn't get updated while the child form still exists.
Instead of ShowDialog, you can use Show - which allows both forms to continue working - but in any case you are going at this the wrong way:
1) Creating a new instance of the "parent" form and calling it's methods will not affect the existing one: it's a separate instance and does not share a DataGridView with any other. In order to directly update the parent, you would need to use the actual instance that opened the child, not a new one.
2) But the child form shouldn't even know the parent form exists, much less what type it is, or what methods it contains. Instead, the child should raise events that the parent handles and let teh parent do what it wants with the updates.

That probably sounds complicated, but it actually solves both your problems very neatly. Have a look here:
Transferring information between two forms, Part 2: Child to Parent[^]
It will show you how to do it properly.
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GeneralRe: Refreshing data on a parent form at child close Pin
Uranium-23521-Apr-20 22:48
MemberUranium-23521-Apr-20 22:48 
GeneralRe: Refreshing data on a parent form at child close Pin
OriginalGriff21-Apr-20 23:04
mveOriginalGriff21-Apr-20 23:04 
GeneralRe: Refreshing data on a parent form at child close Pin
Uranium-23522-Apr-20 23:27
MemberUranium-23522-Apr-20 23:27 
GeneralRe: Refreshing data on a parent form at child close Pin
OriginalGriff23-Apr-20 0:09
mveOriginalGriff23-Apr-20 0:09 
GeneralRe: Refreshing data on a parent form at child close Pin
Uranium-23523-Apr-20 10:46
MemberUranium-23523-Apr-20 10:46 
GeneralRe: Refreshing data on a parent form at child close Pin
OriginalGriff23-Apr-20 11:06
mveOriginalGriff23-Apr-20 11:06 
GeneralRe: Refreshing data on a parent form at child close Pin
Uranium-23524-Apr-20 17:53
MemberUranium-23524-Apr-20 17:53 
GeneralRe: Refreshing data on a parent form at child close Pin
OriginalGriff24-Apr-20 20:08
mveOriginalGriff24-Apr-20 20:08 
GeneralRe: Refreshing data on a parent form at child close Pin
Uranium-23525-Apr-20 19:42
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AnswerRe: Refreshing data on a parent form at child close Pin
#realJSOP22-Apr-20 7:15
mva#realJSOP22-Apr-20 7:15 
QuestionMaintain the Runing balance in Datagridview Pin
Mukhtar Ashiq21-Apr-20 9:04
MemberMukhtar Ashiq21-Apr-20 9:04 
SuggestionRe: Maintain the Runing balance in Datagridview Pin
Richard MacCutchan21-Apr-20 9:15
mveRichard MacCutchan21-Apr-20 9:15 
AnswerRe: Maintain the Runing balance in Datagridview Pin
ZurdoDev21-Apr-20 9:51
mveZurdoDev21-Apr-20 9:51 
Questionextending an Enum with a function that returns a generic value ? Pin
BillWoodruff20-Apr-20 8:58
mveBillWoodruff20-Apr-20 8:58 
AnswerRe: extending an Enum with a function that returns a generic value ? Pin
Richard Deeming20-Apr-20 9:34
mveRichard Deeming20-Apr-20 9:34 
GeneralRe: extending an Enum with a function that returns a generic value ? Pin
BillWoodruff20-Apr-20 11:56
mveBillWoodruff20-Apr-20 11:56 
GeneralRe: extending an Enum with a function that returns a generic value ? Pin
BillWoodruff20-Apr-20 22:10
mveBillWoodruff20-Apr-20 22:10 

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