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I want to add specific data column from database to the data table on text box click

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I am using visual studio 2008, In web application(C#) , I take gridview, DropDownList and a text box contol, when I select value from dropdownlist, I want to show the data related to that dropdownlist value from database in the data table, but only specific columns NOT all the values from databse table.??
how can done this??
Anyone have the idea about this??
please help...
thanks
Apr 14 '16 #1
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