extjs 前端js代码调用后台函数方法

前端javascript代码部分：
Ext.Ajax.request(
{
url: '/Process/SuspendWorkFlow',   //配置的后台函数路由
params: { wfInsId: wf.WFInstanceID, status: cmd }, //对应函数的参数
success: function () {
LaunchedWFGrid.store.reload();
Ext.Msg.show({ title: "提示", msg: successMsg, buttons: Ext.Msg.OK, icon: Ext.MessageBox.INFO });
},
failure: function () {
Ext.Msg.show({ title: "提示", msg: failureMsg, buttons: Ext.Msg.OK, icon: Ext.MessageBox.ERROR });
}
}
);

//后台函数

public AjaxResult SuspendWorkFlow(string wfInsId, string status)
{
AjaxResult result = new AjaxResult();
try
{
bool flag = false;
switch (status)
{
case "Suspend":
flag = this.BPM.UpdateWFInstanceStatus(wfInsId, EnumWFStatus.暂停);
break;
case "ReRun":
flag = this.BPM.UpdateWFInstanceStatus(wfInsId, EnumWFStatus.等待);
break;
case "Cancel":
flag = this.BPM.UpdateWFInstanceStatus(wfInsId, EnumWFStatus.取消);
break;
}
result.Result = flag;
}
catch (Exception e)
{
result.ErrorMessage = e.ToString();
}
return result;
}