{ field: 'C4', title: '下载附件', width: 200, align: 'center',
                        formatter: function(value, rec) {
                        return "<input type=\"button\" value=\"下载附件\" onclick=\"DownFile('" + value + "','" + rec['C2'] + "')\" />";
                        }
                    }
 function DownFile(title,val) {
            $('#distributionform').form('submit', {
                url: '/WorkAera/PublicWork/ASHX/ProjectListInformation.ashx?DownId=' +title ,
                onSubmit: function() {
                    $('#HiddenPID').val(val);
                },
                success: function(data) {
                    $('#distributionWindow').dialog('close');
                    $('#HiddenUserId').val("");
                    $('#HiddenPID').val("");
                    if (data == "Exception") {
                        $.messager.alert('运行异常', '对不起，系统运行异常，请您按要求填写信息，或者请您重启浏览器！', 'error');
                    }
                }
            });
        }

------解决方案--------------------

   				var insertRows = $('#test').datagrid('getChanges','inserted');
   				var updateRows = $('#test').datagrid('getChanges','updated');
   				var deleteRows = $('#test').datagrid('getChanges','deleted');
   				var changesRows = {
   	    				inserted : [],
   	    				updated : [],
   	    				deleted : [],
   	    				};
  					if (insertRows.length>0) {
  						for (var i=0;i<insertRows.length;i++) {
  							changesRows.inserted.push(insertRows[i]);
  						}
  					}

  					if (updateRows.length>0) {
  						for (var k=0;k<updateRows.length;k++) {
  							changesRows.updated.push(updateRows[k]);
  						}
  					}
  					
  					if (deleteRows.length>0) {
  						for (var j=0;j<deleteRows.length;j++) {
  							changesRows.deleted.push(deleteRows[j]);
  						}
  					}   	
			
					$.ajax({
  							 type: "post",  
  							 url: "../stock/stock_modify.asp",   	
							 data: "inserted="+JSON.stringify(changesRows.inserted)+"&updated="+JSON.stringify(changesRows.updated)+"&deleted="+JSON.stringify(changesRows.deleted),  
  							 datatype: "json",
  							 success:function(data){
								
											 }  
							
							
						})

以上是针对插入删除更新 操作