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Have You tried<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; this.Datagrid1.Rows.Remove<wbr />At(0) &nbsp;?<br />

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Have You tried
                this.Datagrid1.Rows.RemoveAt(0)  ?


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How's that work? Is it will remove the record from my sql table completely?
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How's that work? Is it will remove the record from my sql table completely?

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No it won't remove.<br />
You need to call Update method of a TableAdapter to which Your datagrid is bind
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No it won't remove.
You need to call Update method of a TableAdapter to which Your datagrid is bind

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Can you tell me how to delete record in datagrid?<br />
<br />
Ex:<br />
id(Invisible) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Date &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Aggregate &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Network &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;System &nbsp; &nbsp; &nbsp; &nbsp; Application &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Delete<br />
1 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Dec 2007 &nbsp; &nbsp; &nbsp; &nbsp; 100.00 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 97.00 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 100.00 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 100.00 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Delete<br />
2 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Dec 2007 &nbsp; &nbsp; &nbsp; &nbsp; 100.00 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 90.50 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 88.00 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 100.00 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Delete<br />
<br />
The id column is invisible. 
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Can you tell me how to delete record in datagrid?

Ex:
id(Invisible)           Date              Aggregate          Network            System         Application            Delete
1                          Dec 2007         100.00                 97.00               100.00           100.00                Delete
2                          Dec 2007         100.00                 90.50               88.00             100.00                Delete

The id column is invisible. 

How to delete record with datagrid?

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