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In fact gridToClipboard() serialize grid to CSV format and paster this string into clipboard. So you can use method setSerializableColumns(list) to define which columns should be copied to the clipboard. In the method parameter list - list of true/false values separated by comma, if list empty then all fields will be serialized.

You can change list of serializable columns with "onColumnHidden" event:

mygrid.attachEvent("onColumnHidden",function(ind){

mygrid.setSerializableColumns(list);

});

To know if column is hidden you can use method isColumnHidden(ind) where ind - index of a column.

To know if column will be serialized you can use internal property mygrid._srClmn[cellIndex] (= true/false). Note that this propersty is created only after calling method setSerializableColumns(). So you can call setSerializableColumns("true,true,true,true....") with grid init and in the "onColumnHidden" handler connect directly ot the _srClmn array:

mygrid.attachEvent("onColumnHidden",function(ind){

mygrid._srClmn[ind]=false;

});

You should loop through all of the columns:

for (var i=0; i<mygrid.getColumnsNum()-1; i++){

if (mygrid.isColumnHidden(i)) mygrid._srClmn[i]=false;

else mygrid._srClmn[i]=true;

}

Note before using this code setSerializableColumns should be called at list once.