Question

我在SharePoint中创建了带有C＃编码的事件接收器。当项目应该匹配时已经有了。它显示这样的按摩是我的代码..

    public override void ItemAdding(SPItemEventProperties properties)
    {
            base.ItemAdding(properties);  
            SPList oList = null;
            string strCarName = string.Empty;
            using (SPWeb web = properties.Web)
            {
                oList = web.Lists["Cars"];
                string dropdwnvalue = web.Lists[properties.ListId].Fields["CarName"].InternalName;
                String lookupFieldStringValue = Convert.ToString(properties.AfterProperties[dropdwnvalue]);
                SPListItem item = oList.Items[Convert.ToInt32(lookupFieldStringValue) - 1];
                strCarName = Convert.ToString(item["LinkTitle"]);
            }
            string strStartdate = Convert.ToString(properties.AfterProperties["EventDate"]);
            SPQuery existingItemsQuery = new SPQuery();
            existingItemsQuery.Query = "<Where><And><Eq><FieldRef Name='EventDate'/><Value Type='DateTime'>" + strStartdate + "</Value></Eq><Eq><FieldRef Name='Car_x0020_Name'/><Value Type='Lookup'>" + strCarName + "</Value></Eq></And></Where>";
            SPListItemCollection existingItems = properties.List.GetItems(existingItemsQuery);


                if (existingItems.Count >= 1)
                {

                    properties.Cancel = true;
                    properties.ErrorMessage = "Item is already exists";
                    properties.Status = SPEventReceiverStatus.CancelWithError;
                    // ClientScript.RegisterStartupScript(typeof(Page), "test", "<script>alert('Hello');return false;</script>"); 
                }

输出： -

项目已存在。该项只在一天中添加一次。我不能再添加另一项。但我想在一天的更改时间内添加另一个项目

任何人都可以帮助我。

Answer 1

正如我所看到的，您对查询字符串有疑问，您应该使用：

existingItemsQuery.Query = "<Where><And><Eq><FieldRef Name='EventDate'/><Value Type='DateTime' IncludeTimeValue='TRUE'>" + strStartdate + "</Value></Eq><Eq><FieldRef Name='Car_x0020_Name'/><Value Type='Lookup'>" + strCarName + "</Value></Eq></And></Where>";

你应该使用strStartdate这样的格式'1971-01-01T00：00：00Z'

您可以使用此方法：

SPUtility.CreateISO8601DateTimeFromSystemDateTime(properties.AfterProperties["EventDate"])

希望这有帮助！

在sharepoint 2010中使用事件接收器的PopUp警报消息

1 个答案: