如何使用 sql table 中的坐标作为天气 URL API SSIS 脚本中的参数输入？
How to use coordinates from a sql table as parameter input in Weather URL API SSIS script?
我创建了一个 SSIS 项目，它在脚本任务中使用 Web API 检索天气信息（JSON 格式）。我一直在关注本教程 :Weather data API 如果您只想从一组固定的坐标中检索天气信息，该教程非常有用。
我现在的目标是使用 table，我在 API URL 参数中存储了一些坐标作为变量输入，而不是在 URL https://api.met.no/weatherapi/locationforecast/2.0/compact.json?lat=55.596&lon=15
所以我这样做是为了
- 创建了一个收集天气信息的脚本任务：
#region Help: Introduction to the script task
/* The Script Task allows you to perform virtually any operation that can be accomplished in
* a .Net application within the context of an Integration Services control flow.
*
* Expand the other regions which have "Help" prefixes for examples of specific ways to use
* Integration Services features within this script task. */
#endregion
#region Namespaces
using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Net;
#endregion
namespace ST_6f60bececd8f4f94afaf758869590918
{
/// <summary>
/// ScriptMain is the entry point class of the script. Do not change the name, attributes,
/// or parent of this class.
/// </summary>
[Microsoft.SqlServer.Dts.Tasks.ScriptTask.SSISScriptTaskEntryPointAttribute]
public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
{
#region Help: Using Integration Services variables and parameters in a script
/* To use a variable in this script, first ensure that the variable has been added to
* either the list contained in the ReadOnlyVariables property or the list contained in
* the ReadWriteVariables property of this script task, according to whether or not your
* code needs to write to the variable. To add the variable, save this script, close this instance of
* Visual Studio, and update the ReadOnlyVariables and
* ReadWriteVariables properties in the Script Transformation Editor window.
* To use a parameter in this script, follow the same steps. Parameters are always read-only.
*
* Example of reading from a variable:
* DateTime startTime = (DateTime) Dts.Variables["System::StartTime"].Value;
*
* Example of writing to a variable:
* Dts.Variables["User::myStringVariable"].Value = "new value";
*
* Example of reading from a package parameter:
* int batchId = (int) Dts.Variables["$Package::batchId"].Value;
*
* Example of reading from a project parameter:
* int batchId = (int) Dts.Variables["$Project::batchId"].Value;
*
* Example of reading from a sensitive project parameter:
* int batchId = (int) Dts.Variables["$Project::batchId"].GetSensitiveValue();
* */
#endregion
#region Help: Firing Integration Services events from a script
/* This script task can fire events for logging purposes.
*
* Example of firing an error event:
* Dts.Events.FireError(18, "Process Values", "Bad value", "", 0);
*
* Example of firing an information event:
* Dts.Events.FireInformation(3, "Process Values", "Processing has started", "", 0, ref fireAgain)
*
* Example of firing a warning event:
* Dts.Events.FireWarning(14, "Process Values", "No values received for input", "", 0);
* */
#endregion
#region Help: Using Integration Services connection managers in a script
/* Some types of connection managers can be used in this script task. See the topic
* "Working with Connection Managers Programatically" for details.
*
* Example of using an ADO.Net connection manager:
* object rawConnection = Dts.Connections["Sales DB"].AcquireConnection(Dts.Transaction);
* SqlConnection myADONETConnection = (SqlConnection)rawConnection;
* //Use the connection in some code here, then release the connection
* Dts.Connections["Sales DB"].ReleaseConnection(rawConnection);
*
* Example of using a File connection manager
* object rawConnection = Dts.Connections["Prices.zip"].AcquireConnection(Dts.Transaction);
* string filePath = (string)rawConnection;
* //Use the connection in some code here, then release the connection
* Dts.Connections["Prices.zip"].ReleaseConnection(rawConnection);
* */
#endregion
/// <summary>
/// This method is called when this script task executes in the control flow.
/// Before returning from this method, set the value of Dts.TaskResult to indicate success or failure.
/// To open Help, press F1.
/// </summary>
public void Main()
{
string Longitude = (string)Dts.Variables["User::Longitude"].Value.ToString();
string Latitude = (string)Dts.Variables["User::Latitude"].Value.ToString();
var url = @"https://api.met.no/weatherapi/locationforecast/2.0/compact.json?lat=55.596&lon=15";
System.Net.ServicePointManager.DefaultConnectionLimit = int.MaxValue;
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.UseDefaultCredentials = true;
req.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
var syncClient = new WebClient();
syncClient.Headers.Add("user-agent", "acmeweathersite.com support@acmeweathersite.com");
var content = syncClient.DownloadString(url);
string connectionString = "Data Source=localhost;Initial Catalog=Weather;Integrated Security=True;";
using (SqlConnection conn = new SqlConnection(connectionString))
{
SqlCommand Storproc =
new SqlCommand(@"INSERT INTO [dbo].[Weather] (JSONData)
select @JSONData", conn);
Storproc.Parameters.AddWithValue("@JSONData", content.ToString());
conn.Open();
Storproc.ExecuteNonQuery();
conn.Close();
}
// TODO: Add your code here
Dts.TaskResult = (int)ScriptResults.Success;
}
#region ScriptResults declaration
/// <summary>
/// This enum provides a convenient shorthand within the scope of this class for setting the
/// result of the script.
///
/// This code was generated automatically.
/// </summary>
enum ScriptResults
{
Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
};
#endregion
}
}
- 创建了一个 SQL table，坐标为：
create table Coordinates(
Municipality nvarchar(50),
Latitide nvarchar(50),
Longitude nvarchar(50)
)
INSERT INTO Coordinates (Municipality, Latitide, Longitude)
VALUES (114, 59.5166667, 17.9),
(115, 59.5833333, 18.2),
(117, 59.5, 18.45)
- 添加坐标 table 作为 SQL 任务：
最后我在脚本任务代码中添加了两个变量：
string Longitude = (string)Dts.Variables["User::Longitude"].Value.ToString();
string Latitude = (string)Dts.Variables["User::Latitude"].Value.ToString();
var url = @"https://api.met.no/weatherapi/locationforecast/2.0/compact.json?lat=Latitude&lon=Longitude";
但是当我执行程序包时，Foreach 循环容器会永远循环，不会弹出任何错误，但也不会在数据库中存储任何数据 table。感觉就像我错过了什么，但不确定是什么。当涉及到 SSIS 中的变量时非常新手，请原谅我缺乏知识。在我的示例中，我使用的是 SQL Server 2019.
看起来你快到了。
需要检查的几件事：
在您的 SQL 中，您选择了 3 列，因此，这些列的 'index' 将是：
Municipality -> index = 0
Latitide -> index = 1
Longitude -> index = 2
即在变量映射中，您需要使用索引 1 和 2 而不是全部使用零。
The first column defined in the enumerator item has the index value 0, the second column 1, and so on.
您对列的拼写似乎也不同（Latitide 与 Latitude）。对此也进行交叉检查。即，如果您手动 运行 您的 sql 语句，您能看到数据吗？结果的列名称是什么？
您还可以通过添加 MessageBox 检查脚本任务中的变量（用于调试目的）。
例如，
string longitude = (string)Dts.Variables["User::Longitude"].Value.ToString();
string latitide = (string)Dts.Variables["User::Latitide"].Value.ToString();
string municipality = (string)Dts.Variables["User::Municipality"].Value.ToString();
MessageBox.Show("longitude:" + longitude + ", latitide:" + latitide + ", municipality: " + municipality);
我创建了一个 SSIS 项目，它在脚本任务中使用 Web API 检索天气信息（JSON 格式）。我一直在关注本教程 :Weather data API 如果您只想从一组固定的坐标中检索天气信息，该教程非常有用。 我现在的目标是使用 table，我在 API URL 参数中存储了一些坐标作为变量输入，而不是在 URL https://api.met.no/weatherapi/locationforecast/2.0/compact.json?lat=55.596&lon=15
所以我这样做是为了
- 创建了一个收集天气信息的脚本任务：
#region Help: Introduction to the script task
/* The Script Task allows you to perform virtually any operation that can be accomplished in
* a .Net application within the context of an Integration Services control flow.
*
* Expand the other regions which have "Help" prefixes for examples of specific ways to use
* Integration Services features within this script task. */
#endregion
#region Namespaces
using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Net;
#endregion
namespace ST_6f60bececd8f4f94afaf758869590918
{
/// <summary>
/// ScriptMain is the entry point class of the script. Do not change the name, attributes,
/// or parent of this class.
/// </summary>
[Microsoft.SqlServer.Dts.Tasks.ScriptTask.SSISScriptTaskEntryPointAttribute]
public partial class ScriptMain : Microsoft.SqlServer.Dts.Tasks.ScriptTask.VSTARTScriptObjectModelBase
{
#region Help: Using Integration Services variables and parameters in a script
/* To use a variable in this script, first ensure that the variable has been added to
* either the list contained in the ReadOnlyVariables property or the list contained in
* the ReadWriteVariables property of this script task, according to whether or not your
* code needs to write to the variable. To add the variable, save this script, close this instance of
* Visual Studio, and update the ReadOnlyVariables and
* ReadWriteVariables properties in the Script Transformation Editor window.
* To use a parameter in this script, follow the same steps. Parameters are always read-only.
*
* Example of reading from a variable:
* DateTime startTime = (DateTime) Dts.Variables["System::StartTime"].Value;
*
* Example of writing to a variable:
* Dts.Variables["User::myStringVariable"].Value = "new value";
*
* Example of reading from a package parameter:
* int batchId = (int) Dts.Variables["$Package::batchId"].Value;
*
* Example of reading from a project parameter:
* int batchId = (int) Dts.Variables["$Project::batchId"].Value;
*
* Example of reading from a sensitive project parameter:
* int batchId = (int) Dts.Variables["$Project::batchId"].GetSensitiveValue();
* */
#endregion
#region Help: Firing Integration Services events from a script
/* This script task can fire events for logging purposes.
*
* Example of firing an error event:
* Dts.Events.FireError(18, "Process Values", "Bad value", "", 0);
*
* Example of firing an information event:
* Dts.Events.FireInformation(3, "Process Values", "Processing has started", "", 0, ref fireAgain)
*
* Example of firing a warning event:
* Dts.Events.FireWarning(14, "Process Values", "No values received for input", "", 0);
* */
#endregion
#region Help: Using Integration Services connection managers in a script
/* Some types of connection managers can be used in this script task. See the topic
* "Working with Connection Managers Programatically" for details.
*
* Example of using an ADO.Net connection manager:
* object rawConnection = Dts.Connections["Sales DB"].AcquireConnection(Dts.Transaction);
* SqlConnection myADONETConnection = (SqlConnection)rawConnection;
* //Use the connection in some code here, then release the connection
* Dts.Connections["Sales DB"].ReleaseConnection(rawConnection);
*
* Example of using a File connection manager
* object rawConnection = Dts.Connections["Prices.zip"].AcquireConnection(Dts.Transaction);
* string filePath = (string)rawConnection;
* //Use the connection in some code here, then release the connection
* Dts.Connections["Prices.zip"].ReleaseConnection(rawConnection);
* */
#endregion
/// <summary>
/// This method is called when this script task executes in the control flow.
/// Before returning from this method, set the value of Dts.TaskResult to indicate success or failure.
/// To open Help, press F1.
/// </summary>
public void Main()
{
string Longitude = (string)Dts.Variables["User::Longitude"].Value.ToString();
string Latitude = (string)Dts.Variables["User::Latitude"].Value.ToString();
var url = @"https://api.met.no/weatherapi/locationforecast/2.0/compact.json?lat=55.596&lon=15";
System.Net.ServicePointManager.DefaultConnectionLimit = int.MaxValue;
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.UseDefaultCredentials = true;
req.Proxy.Credentials = System.Net.CredentialCache.DefaultCredentials;
var syncClient = new WebClient();
syncClient.Headers.Add("user-agent", "acmeweathersite.com support@acmeweathersite.com");
var content = syncClient.DownloadString(url);
string connectionString = "Data Source=localhost;Initial Catalog=Weather;Integrated Security=True;";
using (SqlConnection conn = new SqlConnection(connectionString))
{
SqlCommand Storproc =
new SqlCommand(@"INSERT INTO [dbo].[Weather] (JSONData)
select @JSONData", conn);
Storproc.Parameters.AddWithValue("@JSONData", content.ToString());
conn.Open();
Storproc.ExecuteNonQuery();
conn.Close();
}
// TODO: Add your code here
Dts.TaskResult = (int)ScriptResults.Success;
}
#region ScriptResults declaration
/// <summary>
/// This enum provides a convenient shorthand within the scope of this class for setting the
/// result of the script.
///
/// This code was generated automatically.
/// </summary>
enum ScriptResults
{
Success = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Success,
Failure = Microsoft.SqlServer.Dts.Runtime.DTSExecResult.Failure
};
#endregion
}
}
- 创建了一个 SQL table，坐标为：
create table Coordinates(
Municipality nvarchar(50),
Latitide nvarchar(50),
Longitude nvarchar(50)
)
INSERT INTO Coordinates (Municipality, Latitide, Longitude)
VALUES (114, 59.5166667, 17.9),
(115, 59.5833333, 18.2),
(117, 59.5, 18.45)
- 添加坐标 table 作为 SQL 任务：
最后我在脚本任务代码中添加了两个变量：
string Longitude = (string)Dts.Variables["User::Longitude"].Value.ToString();
string Latitude = (string)Dts.Variables["User::Latitude"].Value.ToString();
var url = @"https://api.met.no/weatherapi/locationforecast/2.0/compact.json?lat=Latitude&lon=Longitude";
但是当我执行程序包时，Foreach 循环容器会永远循环，不会弹出任何错误，但也不会在数据库中存储任何数据 table。感觉就像我错过了什么，但不确定是什么。当涉及到 SSIS 中的变量时非常新手，请原谅我缺乏知识。在我的示例中，我使用的是 SQL Server 2019.
看起来你快到了。
需要检查的几件事：
在您的 SQL 中，您选择了 3 列，因此，这些列的 'index' 将是：
Municipality -> index = 0
Latitide -> index = 1
Longitude -> index = 2
即在变量映射中，您需要使用索引 1 和 2 而不是全部使用零。
The first column defined in the enumerator item has the index value 0, the second column 1, and so on.
您对列的拼写似乎也不同（Latitide 与 Latitude）。对此也进行交叉检查。即，如果您手动 运行 您的 sql 语句，您能看到数据吗？结果的列名称是什么？
您还可以通过添加 MessageBox 检查脚本任务中的变量（用于调试目的）。
例如，
string longitude = (string)Dts.Variables["User::Longitude"].Value.ToString();
string latitide = (string)Dts.Variables["User::Latitide"].Value.ToString();
string municipality = (string)Dts.Variables["User::Municipality"].Value.ToString();
MessageBox.Show("longitude:" + longitude + ", latitide:" + latitide + ", municipality: " + municipality);