下面的代码将数据一一发送到我的服务器。问题是我有。我不知道为什么会这样。例如，我正在发送10个数据，将仅发送9个，最后一个失败，并显示异常。可能是什么原因造成的？
System.ArgumentOutOfRangeException：索引超出范围。必须为非负数并且小于集合的大小。参数名称：索引
var db = DependencyService.Get<ISQLiteDB>();
var conn = db.GetConnection();
var current_datetime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
var changessql = "SELECT * FROM tblCaf WHERE EmployeeID = '" + contact + "' AND LastUpdated > LastSync AND Deleted != '1'";
var getCAFChanges = conn.QueryAsync<CAFTable>(changessql);
var changesresultCount = getCAFChanges.Result.Count;
if (changesresultCount > 0)
{
for (int i = 0; i < changesresultCount; i++)
{
lblStatus.Text = "Sending coordinator activity changes to server " + (i + 1) + " out of " + changesresultCount;
var crresult = getCAFChanges.Result[i];
var crcafNo = crresult.CAFNo;
var cremployeeID = crresult.EmployeeID;
var crcafDate = crresult.CAFDate;
var crcustomerID = crresult.CustomerID;
var crstartTime = crresult.StartTime;
var crendTime = crresult.EndTime;
var crphoto1 = crresult.Photo1;
var crphoto2 = crresult.Photo2;
var crphoto3 = crresult.Photo3;
var crvideo = crresult.Video;
var crmobilePhoto1 = crresult.MobilePhoto1;
var crmobilePhoto2 = crresult.MobilePhoto2;
var crmobilePhoto3 = crresult.MobilePhoto3;
var crmobileVideo = crresult.MobileVideo;
var crremarks = crresult.Remarks;
var crotherConcern = crresult.OtherConcern;
var crdeleted = crresult.Deleted;
var crlastUpdated = crresult.LastUpdated;
var crlink = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=k5N7PE";
string crcontentType = "application/json";
Object crjson = new JObject
{
{ "CAFNo", crcafNo },
{ "EmployeeID", cremployeeID },
{ "CAFDate", crcafDate },
{ "CustomerID", crcustomerID },
{ "StartTime", crstartTime },
{ "EndTime", crendTime },
{ "MobilePhoto1", crmobilePhoto1 },
{ "MobilePhoto2", crmobilePhoto2 },
{ "MobilePhoto3", crmobilePhoto3 },
{ "MobileVideo", crmobileVideo },
{ "Remarks", crremarks },
{ "OtherConcern", crotherConcern },
{ "Deleted", crdeleted },
{ "LastUpdated", crlastUpdated }
};
HttpClient crclient = new HttpClient();
var crresponse = await crclient.PostAsync(crlink, new StringContent(crjson.ToString(), Encoding.UTF8, crcontentType));
if (crresponse.IsSuccessStatusCode)
{
byte[] crPhoto1Data = File.ReadAllBytes(crphoto1);
var ph1link = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=N4f5GL";
string ph1contentType = "application/json";
JObject ph1json = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Photo1", crPhoto1Data }
};
HttpClient ph1client = new HttpClient();
var ph1response = await ph1client.PostAsync(ph1link, new StringContent(ph1json.ToString(), Encoding.UTF8, ph1contentType));
if (ph1response.IsSuccessStatusCode)
{
byte[] crPhoto2Data = File.ReadAllBytes(crphoto2);
var ph2link = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=6LqMxW";
string ph2contentType = "application/json";
JObject ph2json = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Photo2", crPhoto2Data }
};
HttpClient ph2client = new HttpClient();
var ph2response = await ph2client.PostAsync(ph2link, new StringContent(ph2json.ToString(), Encoding.UTF8, ph2contentType));
if (ph2response.IsSuccessStatusCode)
{
byte[] crPhoto3Data = File.ReadAllBytes(crphoto3);
var ph3link = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=Mpt2Y9";
string ph3contentType = "application/json";
JObject ph3json = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Photo3", crPhoto3Data }
};
HttpClient ph3client = new HttpClient();
var ph3response = await ph3client.PostAsync(ph3link, new StringContent(ph3json.ToString(), Encoding.UTF8, ph3contentType));
if (ph3response.IsSuccessStatusCode)
{
try
{
byte[] crVideoData;
if (!string.IsNullOrEmpty(crvideo))
{
crVideoData = File.ReadAllBytes(crvideo);
}
else
{
crVideoData = null;
}
if (!string.IsNullOrEmpty(crvideo))
{
try
{
var vidlink = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=Lqr9fy";
string vidcontentType = "application/json";
JObject vidjson = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Video", crVideoData }
};
HttpClient vidclient = new HttpClient();
var vidresponse = await vidclient.PostAsync(vidlink, new StringContent(vidjson.ToString(), Encoding.UTF8, vidcontentType));
if (vidresponse.IsSuccessStatusCode)
{
await conn.QueryAsync<CAFTable>("UPDATE tblCaf SET LastSync = ? WHERE CAFNo = ?", DateTime.Parse(current_datetime), crcafNo);
}
}
catch (Exception ex)
{
Crashes.TrackError(ex);
var seedata = await DisplayAlert("Sync Error", "Video send failed, unstable connection to server", "See unsynced data", "Cancel");
if (seedata == true)
{
await Navigation.PushAsync(new UnsyncedData(host, database, contact, ipaddress, pingipaddress));
}
}
}
else
{
await conn.QueryAsync<CAFTable>("UPDATE tblCaf SET LastSync = ? WHERE CAFNo = ?", DateTime.Parse(current_datetime), crcafNo);
}
}
catch(Exception ex)
{
Crashes.TrackError(ex);
var seedata = await DisplayAlert("Sync Error", "Activity send failed, unstable connection to server", "See unsynced data", "Cancel");
if (seedata == true)
{
await Navigation.PushAsync(new UnsyncedData(host, database, contact, ipaddress, pingipaddress));
}
}
}
}
}
}
}
}
答案 0 :(得分：1)
我建议您使用foreach循环，这将使您摆脱讨厌的System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index异常。
foreach (var crresult in getCAFChanges.Result)
{
// lblStatus.Text = "Sending coordinator activity changes to server " + (i + 1) + " out of " + changesresultCount;
var crcafNo = crresult.CAFNo;
var cremployeeID = crresult.EmployeeID;
var crcafDate = crresult.CAFDate;
var crcustomerID = crresult.CustomerID;
var crstartTime = crresult.StartTime;
var crendTime = crresult.EndTime;
var crphoto1 = crresult.Photo1;
var crphoto2 = crresult.Photo2;
var crphoto3 = crresult.Photo3;
var crvideo = crresult.Video;
var crmobilePhoto1 = crresult.MobilePhoto1;
var crmobilePhoto2 = crresult.MobilePhoto2;
var crmobilePhoto3 = crresult.MobilePhoto3;
var crmobileVideo = crresult.MobileVideo;
var crremarks = crresult.Remarks;
var crotherConcern = crresult.OtherConcern;
var crdeleted = crresult.Deleted;
var crlastUpdated = crresult.LastUpdated;
var crlink = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=k5N7PE";
string crcontentType = "application/json";
Object crjson = new JObject
{
{ "CAFNo", crcafNo },
{ "EmployeeID", cremployeeID },
{ "CAFDate", crcafDate },
{ "CustomerID", crcustomerID },
{ "StartTime", crstartTime },
{ "EndTime", crendTime },
{ "MobilePhoto1", crmobilePhoto1 },
{ "MobilePhoto2", crmobilePhoto2 },
{ "MobilePhoto3", crmobilePhoto3 },
{ "MobileVideo", crmobileVideo },
{ "Remarks", crremarks },
{ "OtherConcern", crotherConcern },
{ "Deleted", crdeleted },
{ "LastUpdated", crlastUpdated }
};
HttpClient crclient = new HttpClient();
var crresponse = await crclient.PostAsync(crlink, new StringContent(crjson.ToString(), Encoding.UTF8, crcontentType));
if (crresponse.IsSuccessStatusCode)
{
byte[] crPhoto1Data = File.ReadAllBytes(crphoto1);
var ph1link = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=N4f5GL";
string ph1contentType = "application/json";
JObject ph1json = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Photo1", crPhoto1Data }
};
HttpClient ph1client = new HttpClient();
var ph1response = await ph1client.PostAsync(ph1link, new StringContent(ph1json.ToString(), Encoding.UTF8, ph1contentType));
if (ph1response.IsSuccessStatusCode)
{
byte[] crPhoto2Data = File.ReadAllBytes(crphoto2);
var ph2link = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=6LqMxW";
string ph2contentType = "application/json";
JObject ph2json = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Photo2", crPhoto2Data }
};
HttpClient ph2client = new HttpClient();
var ph2response = await ph2client.PostAsync(ph2link, new StringContent(ph2json.ToString(), Encoding.UTF8, ph2contentType));
if (ph2response.IsSuccessStatusCode)
{
byte[] crPhoto3Data = File.ReadAllBytes(crphoto3);
var ph3link = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=Mpt2Y9";
string ph3contentType = "application/json";
JObject ph3json = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Photo3", crPhoto3Data }
};
HttpClient ph3client = new HttpClient();
var ph3response = await ph3client.PostAsync(ph3link, new StringContent(ph3json.ToString(), Encoding.UTF8, ph3contentType));
if (ph3response.IsSuccessStatusCode)
{
try
{
byte[] crVideoData;
if (!string.IsNullOrEmpty(crvideo))
{
crVideoData = File.ReadAllBytes(crvideo);
}
else
{
crVideoData = null;
}
if (!string.IsNullOrEmpty(crvideo))
{
try
{
var vidlink = "http://" + ipaddress + Constants.requestUrl + "Host=" + host + "&Database=" + database + "&Contact=" + contact + "&Request=Lqr9fy";
string vidcontentType = "application/json";
JObject vidjson = new JObject
{
{ "CAFNo", crcafNo },
{ "CAFDate", crcafDate },
{ "Video", crVideoData }
};
HttpClient vidclient = new HttpClient();
var vidresponse = await vidclient.PostAsync(vidlink, new StringContent(vidjson.ToString(), Encoding.UTF8, vidcontentType));
if (vidresponse.IsSuccessStatusCode)
{
await conn.QueryAsync<CAFTable>("UPDATE tblCaf SET LastSync = ? WHERE CAFNo = ?", DateTime.Parse(current_datetime), crcafNo);
}
}
catch (Exception ex)
{
Crashes.TrackError(ex);
var seedata = await DisplayAlert("Sync Error", "Video send failed, unstable connection to server", "See unsynced data", "Cancel");
if (seedata == true)
{
await Navigation.PushAsync(new UnsyncedData(host, database, contact, ipaddress, pingipaddress));
}
}
}
else
{
await conn.QueryAsync<CAFTable>("UPDATE tblCaf SET LastSync = ? WHERE CAFNo = ?", DateTime.Parse(current_datetime), crcafNo);
}
}
catch (Exception ex)
{
Crashes.TrackError(ex);
var seedata = await DisplayAlert("Sync Error", "Activity send failed, unstable connection to server", "See unsynced data", "Cancel");
if (seedata == true)
{
await Navigation.PushAsync(new UnsyncedData(host, database, contact, ipaddress, pingipaddress));
}
}
}