database query in c# -


i facing problem access data given user if specifying query directly running fine

protected void button1_click(object sender, eventargs e) {     try     {         string v = (enterid.text);         cn.open();         sqlcommand sda = new sqlcommand("select name professor branch=***"+ v +"***", cn);         sda.commandtype = commandtype.text;         sqldatareader dr = sda.executereader();         while (dr.read())         {             v = dr[0].tostring();             selectname.items.add(v);         }         dr.close();     }     catch (exception ex)     {         messagebox.show(ex.message);     }         {          cn.close();     }  }

you need use quotes:

"select name professor branch='***"+ v +"***'"

however must use parameters , not concatenate strings in query.


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