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I have a datagridview and i have added a textbox column inside it and i want to get the value entered in the textbox how can i do it?
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Let's suppose you know the instance of the cell, have its reference; and the cell should be of the runtime type System.Windows.Forms.DataGridViewTextBoxCell:
http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridviewtextboxcell.aspx[^].

For your purpose, even if you only have a reference of System.Windows.Forms.DataGridViewCell, you don't need to type cast it to this cell type, if you know that the cell is right, otherwise you can simply check up its ValueType:
http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridviewtextboxcell.valuetype.aspx[^].

And then you can directly work with its Value property: http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridviewcell.value.aspx[^].

As the compile-time type of this property is System.Object, you will need to type cast it to string to return the text box's text.

—SA
 
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