//扩展datagrid:动态添加删除editor
$.extend($.fn.datagrid.methods, { 
addEditor : function(jq, param) { 
if (param instanceof Array) { 
$.each(param, function(index, item) { 
var e = $(jq).datagrid('getColumnOption', item.field); 
e.editor = item.editor; }); 
} else { 
var e = $(jq).datagrid('getColumnOption', param.field); 
e.editor = param.editor; 
} 
}, 
removeEditor : function(jq, param) { 
if (param instanceof Array) { 
$.each(param, function(index, item) { 
var e = $(jq).datagrid('getColumnOption', item); 
e.editor = {}; 
}); 
} else { 
var e = $(jq).datagrid('getColumnOption', param);
e.editor = {}; 
} 
}
});

$("#dg").datagrid('removeEditor','cardNo');//这里的cardNo是需要移除editor的列的field值

$("#dg").datagrid('addEditor',[ //添加cardNo列editor
{field:'cardNo',editor:{
type:'textbox',
options:{
required:true,
validType:'length[3,3]', 
invalidMessage:'请输入3位号码!'
}
}
}]