c# - "Exception thrown: ' System.FormatException ' in Microsoft.SqlServer.Types.dll "在 ASP.NET 控制台应用程序 C#

Question

我正在尝试从纬度、经度点插入一个 Sqlgeography 列到 SQL Server 2016，但我得到了

Exception thrown: 'System.FormatException' in Microsoft.SqlServer.Types.dll

我已经在机器上安装了适用于 SQL Server 2016 的 Microsoft System CLR Types。解决此问题的正确方法是什么。

SqlCommand addpoint = new SqlCommand("INSERT INTO " + Helper.TABLE_ALLINDEXPOINTS + "values (@id, @latitude, @longitude, @streetname, @longlat", sqlConnection);
addpoint.Parameters.AddWithValue("@id", id);
addpoint.Parameters.AddWithValue("@latitude",Convert.ToDouble(snappedPoints[j]["latitude"]));
addpoint.Parameters.AddWithValue("@longitude",Convert.ToDouble(snappedPoints[j]["longitude"]));
addpoint.Parameters.AddWithValue("@streetname", snappedPoints[j]["name"].ToString());
addpoint.Parameters.AddWithValue("@longlat", SqlGeography.STGeomFromText(new SqlChars(string.Format("POINT({0} {1})", snappedPoints[j]["latitude"], snappedPoints[j]["longitude"])), Helper.SRID));
addpoint.ExecuteNonQuery();

错误:

'ConsoleApp2.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: DefaultDomain): Loaded 'C:\Users\ssindhu\source\repos\ConsoleApp2\ConsoleApp2\bin\Debug\ConsoleApp2.exe'. Symbols loaded. 'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Net.Http\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Net.Http.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\System.Data\v4.0_4.0.0.0__b77a5c561934e089\System.Data.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Users\ssindhu\source\repos\ConsoleApp2\ConsoleApp2\bin\Debug\Newtonsoft.Json.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.SqlServer.Types\14.0.0.0__89845dcd8080cc91\Microsoft.SqlServer.Types.dll'. Cannot find or open the PDB file.
'ConsoleApp2.exe' (CLR v4.0.30319: ConsoleApp2.exe): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\System.Transactions\v4.0_4.0.0.0__b77a5c561934e089\System.Transactions.dll'. Cannot find or open the PDB file.

这是表架构:

create table all_index_points
(
    id varchar(450) not null primary key,
    latitude float,
    longitude float,
    streetname nvarchar(max),
    longlat geography
);

Answer 1

以下是您的代码中需要更正的一些内容:

SqlCommand addpoint = new SqlCommand("INSERT INTO " + Helper.TABLE_ALLINDEXPOINTS + " values (@id, @latitude, @longitude, @streetname, @longlat)", sqlConnection);

注意值前的空格。还缺少右括号。

addpoint.Parameters.AddWithValue("@id", id);
addpoint.Parameters.AddWithValue("@latitude",Convert.ToDouble(snappedPoints[j]["latitude"]));
addpoint.Parameters.AddWithValue("@longitude",Convert.ToDouble(snappedPoints[j]["longitude"]));
addpoint.Parameters.AddWithValue("@streetname", snappedPoints[j]["name"].ToString());
addpoint.Parameters.AddWithValue("@longlat", SqlGeography.STGeomFromText(new SqlChars(string.Format("POINT({0} {1})", snappedPoints[j]["latitude"], snappedPoints[j]["longitude"])), Helper.SRID));
addpoint.ExecuteNonQuery();

如果上述方法不能解决您的问题，请同时分享您的异常的详细信息以及您的表字段的可能数据类型。

编辑

除了上述所有问题之外，您面临的实际问题将通过在调用 ExecuteQuery 之前附加以下行来解决:

addpoint.Parameters[4].UdtTypeName = "Geography";

因为 SQL Server 要求您为类型为 SqlGeography 的参数显式设置 UdtTypeName(以及一些其他类型，我在此不提及)。

所以你更新后的代码应该是这样的:

addpoint.Parameters.AddWithValue("@id", id);
addpoint.Parameters.AddWithValue("@latitude",Convert.ToDouble(snappedPoints[j]["latitude"]));
addpoint.Parameters.AddWithValue("@longitude",Convert.ToDouble(snappedPoints[j]["longitude"]));
addpoint.Parameters.AddWithValue("@streetname", snappedPoints[j]["name"].ToString());
addpoint.Parameters.AddWithValue("@longlat", SqlGeography.STGeomFromText(new SqlChars(string.Format("POINT({0} {1})", snappedPoints[j]["latitude"], snappedPoints[j]["longitude"])), Helper.SRID));
addpoint.Parameters[4].UdtTypeName = "Geography";
addpoint.ExecuteNonQuery();

希望这能解决您所有的问题。

另一个注意事项是对提供的字符串格式使用 Helper.SRID = 4326。