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I got an error
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#1
 
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I got an error -
07-02-2010
, 05:42 AM
#2
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Hi guys, I've created a simple webpage with a datagridview, my business object. If i try to modify a record i get an error on date value: Dettagli eccezione: System.InvalidOperationException: Impossible to convert the value of parameter 'DataNascita' from 'System.String' to 'System.DateTime'. What should I do? Thanks |
representing a date and time.
The string date and time must be converted over to System.Datetime
before the field or variable can be populated by string data the
represents a date and time.
You should look up how to use the 'Convert' statement.
#3
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redbull wrote: Hi guys, I've created a simple webpage with a datagridview, my business object. If i try to modify a record i get an error on date value: Dettagli eccezione: System.InvalidOperationException: Impossible to convert the value of parameter 'DataNascita' from 'System.String' to 'System.DateTime'. What should I do? Thanks You can't populate a DateTime value field or variable with string data representing a date and time. The string date and time must be converted over to System.Datetime before the field or variable can be populated by string data the represents a date and time. You should look up how to use the 'Convert' statement. |
to insert the value i do:
persona.data= Convert.ToDateTime(Me.TextBox3.Text)
The problem raises when i click on update dategridview.....but how can I
modify code related to selcet/update/insert in datagridview?
Thanks
#4
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"Mr. Arnold" <Arnold (AT) Arnold (DOT) com> ha scritto nel messaggio news:Ox8s0kdGLHA.5700 (AT) TK2MSFTNGP04 (DOT) phx.gbl... redbull wrote: Hi guys, I've created a simple webpage with a datagridview, my business object. If i try to modify a record i get an error on date value: Dettagli eccezione: System.InvalidOperationException: Impossible to convert the value of parameter 'DataNascita' from 'System.String' to 'System.DateTime'. What should I do? Thanks You can't populate a DateTime value field or variable with string data representing a date and time. The string date and time must be converted over to System.Datetime before the field or variable can be populated by string data the represents a date and time. You should look up how to use the 'Convert' statement. to insert the value i do: persona.data= Convert.ToDateTime(Me.TextBox3.Text) The problem raises when i click on update dategridview.....but how can I modify code related to selcet/update/insert in datagridview? Thanks |
#5
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What is 'DataNascita', because that's what it doesn't like? |
the db
on the business object I have defined the property DataNascita like a
datetime
The problem is got when i call update function on datagridview....
#6
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| "Mr. Arnold" <Arnold (AT) Arnold (DOT) com> ha scritto nel messaggio news:#8mdTghGLHA.5668 (AT) TK2MSFTNGP04 (DOT) phx.gbl... What is 'DataNascita', because that's what it doesn't like? db sqlserver 2008, datanascita means "birth date" and it is a date type on the db on the business object I have defined the property DataNascita like a datetime The problem is got when i call update function on datagridview.... |
apparently that variable type cannot be cast to a string by the
gridview, unless you step in with a function that does so.
#7
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Well, you're going to need to come up with something else, because apparently that variable type cannot be cast to a string by the gridview, unless you step in with a function that does so. |
I don't know what I must do
#8
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| "Mr. Arnold" <Arnold (AT) Arnold (DOT) com> ha scritto nel messaggio news:eXymfC$GLHA.552 (AT) TK2MSFTNGP06 (DOT) phx.gbl... Well, you're going to need to come up with something else, because apparently that variable type cannot be cast to a string by the gridview, unless you step in with a function that does so. How can I do it? Give m some help please. I don't know what I must do |
client-side and the server-side. On the client-side, you can call a
Javascript function that can look at the field and do the conversion to
the type you need. On the server-side, you can goto the event for the
control's method on the codebehind file and do something there.
You should use Bing or Google to look up the events on both sides for
the control and find examples on how you can use the events with code.
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