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SSIS Asynchronous Transformation keep the previous column value and set to the next line

Just encounter an issue when using Asynchronous Transformation in SSIS. For simplifier the question, lets say I just have two outputs, "Name" and "Id".
My C# code is:
string name = "";
string Id = "";
if(...) // read the first line to get Name and partial value of "Id"
{
Output0Buffer.AddRow();
Output0Buffer.Name = Row.Name.Trim();
Id = Row.Id.Trim();
}
else if(...) //read the 2nd line to get the rest part of "Id"
{
Output0Buffer.Id = Id + Row.Id.Trim();
}
So ideally, when two outputs fill the Output0Buffer, "Name" and "Id" will be output, but the issue is, when the 2nd line was read into the buffer, it initialize the String Id again, so the concatenation Output0Buffer.Id = Id + Row.Id.Trim(); does not work. (it works just like "" + rest part of the Id because the 1st part get initialized and 2nd part is the current value)
I would like to stick to use script component transformation at this moment, is there any ways to solve this?

#Brad is on the right train of thought but you'll need to move the declaration of Id to a class level member instead of within the ... SendOutputBuffer or whatever it's called.
If your if statement, you'll then need to test whether Name matches the class level member Name.
You'll need to ensure you have read/write access to the OutputBuffer0 columns. I can't recall what the default is on an async component - might be just write.
Big picture, you're concatenting all the values (ID) into one big string and associating it to the key (name), yeah?
Oh and for performance, you might be better served by declaring Id as a StringBuilder and only casting to String when you assign it to the output buffer

Passing multiple variables between pages and using them

I have three variables I'm trying to pass from one page to another: Two checboxlists (just the checked values) and one DateTime.
I'm getting the checked items like this (this is just for one of these checkboxlists which is called lstUsers):
string cblvalues = "";
foreach (ListItem cbitem in lstUsers.Items)
{
if (cbitem.Selected)
{
cblvalues += cbitem.Value + "-";
}
}
cblvalues = cblvalues.Trim('-');
Response.Redirect("Results.aspx?cblvalues=" + cblvalues);
How would I pass the other checkboxlist and the DateTime to "Results.aspx" as well? I've seen a few different examples such as Server.Transfer, and I'm not sure which one is correct here.
And for using them on the Results.aspx page, would I just do:
string cblvalues = Request.QueryString["cblvalues"];

You can put as many values as you like on the query string. (Though as query strings get very long the web server would eventually impose a limit.) Here you simply append one key/value pair:
Response.Redirect("Results.aspx?cblvalues=" + cblvalues);
Just use a & to separate additional key/value pairs:
Response.Redirect("Results.aspx?cblvalues=" + cblvalues + "&moreValue=" + moreValues);
If you do get to the point where the query string becomes absurdly long and you basically have a lot of data to pass to the next page, then you'd be looking at other ways of doing this. A simple alternative may be to store the values in session state, redirect the user, then pull the values from session state. Something as simple as this:
Session["cblvalues"] = cblvalues;
Session["moreValues"] = moreValues;
Response.Redirect("Results.aspx");
Then in Results.aspx you can get the values:
var cblValues = Session["cblvalues"];
// etc.
You might also clear the session values once you get them, if the session doesn't need to keep carrying them:
Session.Remove("cblvalues");

You can pass multiple values through query string by seperated them with a &
so your snippet will be like the following:
Let cblSecond be the second combobox then;
// Building first value here
foreach (ListItem cbitem in cblSecond.Items)
{
if (cbitem.Selected)
{
cblSecondValues += cbitem.Value + "-";
}
}
Response.Redirect("Results.aspx?cblvalues=" + cblvalues + "&cblSecondValues=" + cblSecondValues);
So that you can access them separately like this:
string cblvalues = Request.QueryString["cblvalues"];// gives you the first value
string cblSecondValues= Request.QueryString["cblSecondValues"];// gives you the second value

Response.Redirect(String.Format("Results.aspx?value1={0}&value2={1}&value3={2}", Value1, Value2, Value3));

If you really want to pass them using querystring then you ahouls include them as well
Response.Redirect("Results.aspx?cblvalues=" + cblvalues + "&cblvalues1=" + cblvalues + "&datetimemy=" + datetimevalue);
Form of a query string like below
http://server_name/path/aspxfile?field1=value1&field2=value2&field3=value3..&fieldn=valuen
As other answer mentioned, there are multiple ways like using Session or cookies or as well you can expose those control values as public properties and use then in next page using Page.PreviousPage property but the restriction is that you will have to use either of Server.Transfer() or Server.Execute() method instead of Response.Redirect.

Querystring encoding issue

I am facing one problem while storing a querystring value in a variable.
My url is something like shown below:
http://localhost:1372/testapp/default.aspx?Search=%family%
Below is what I tried:
string result = Request.QueryString["Search"].ToString();
When I tried to save the querystring search in variable its taking value as �mily% .
How can I get value of search parameter as family?
Thanks in advance.

The query string parameters have to get URL-encoded. The problem ist th % character which is used for URL encoding, so it has to get encoded itself.
'%' becomes '%25'
Which means, the whole URL becomes:
http://localhost:1372/testapp/default.aspx?Search=%25family%25
your can use HttpUtitlity.UrlEncode

In Parent Page Encode query string this way
public static sting Encode(string sData)
{
return HttpUtility.UrlEncode(sData);
}
Now pass this encoded query string to your parent page & on Parent page decode that query string by following function. I assume that encoded query string name is sData & its passed from parent page to child page
public static string Decode()
{
string dSData = HttpUtility.UrlDecode(Request.QueryString["sData"].ToString());
return dsData;
}
I think you have idea about how to pass query string from parent to child page
try this solution for more .

Calculate a new content type field

This is my first post ever here after many years of finding solutions to my issues.
I'm rather new to SharePoint, though not a complete beginner.
Here is what I want to achieve:
I want to create a list, which will be filled by users
This list will contain an Identifier text field, we'll call it strId
This list must contain a field, that's a value retrieved from an oracle database using strId as a parameter
I already did some BDC Models but this seems to be different, as the list elements do not come from a database, just one column does.
I thought about creating a content Type with 2 site columns in it, one with the strId and the other would do the calculation, but I can't seem to be able to do it.
Can anyone help on this matter ?

I would suggest the following:
create external content list : (eg: T_Investigator)
create new custom list (eg: ExternalDisplay)
add your strid as a single line of text
add the external content list as a lookup (eg: external_id), and add the field you wish to see as well (eg: firstname, lastname)
create a sharepoint solution with an eventreceiver with onAdding/onUpdating for the ExternalDisplay list. On adding / updating, you can overwrite the 'external_id' field with the new value in your strid
code:
using Microsoft.SharePoint;
namespace SOEventReceiver.ExternalTest
{
public class ExternalTest : SPItemEventReceiver
{
public override void ItemAdding(SPItemEventProperties properties)
{
string strid = (properties.AfterProperties["strid"] ?? string.Empty).ToString();
if (!string.IsNullOrWhiteSpace(strid))
{
properties.AfterProperties["external_id"] = strid + ";#" + strid;
}
base.ItemAdding(properties);
}
public override void ItemUpdating(SPItemEventProperties properties)
{
string strid = (properties.AfterProperties["strid"] ?? string.Empty).ToString();
if (!string.Equals(strid, properties.ListItem["strid"] ?? string.Empty))
{
properties.AfterProperties["external_id"] = strid + ";#" + strid;
}
base.ItemUpdating(properties);
}
}
}
with elements.xml pointing to the url of your list
<?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
<Receivers ListUrl="Lists/ExternalDisplay">
<Receiver>
<Name>ExternalTestItemAdding</Name>
<Type>ItemAdding</Type>
<Assembly>$SharePoint.Project.AssemblyFullName$</Assembly>
<Class>SOEventReceiver.ExternalTest.ExternalTest</Class>
<SequenceNumber>10000</SequenceNumber>
</Receiver>
<Receiver>
<Name>ExternalTestItemUpdating</Name>
<Type>ItemUpdating</Type>
<Assembly>$SharePoint.Project.AssemblyFullName$</Assembly>
<Class>SOEventReceiver.ExternalTest.ExternalTest</Class>
<SequenceNumber>10000</SequenceNumber>
</Receiver>
</Receivers>
</Elements>
Sharepoint automatically makes the changes since the Lookupfield value has changed, and the external columns are displayed.
The advantage here would be that sharepoint does the main magic, it also doesn't matter which kind of lookup list is behind this (external/sharepoint).
A disadvantage is that the external_id field could also be changed, which wouldn't update the strid field, and you would get inconsistent data. This you could however, also block inside the updating statement

Add empty string to Parameter List for Insertion into AccessDB

I'm trying to insert data into an Access database using the System.Data.OleDb namespace and the method OleDbCommandObject.ExecuteNonQuery(), but I am receiving errors along the lines of:
The OleDbParameterCollection only accepts non-null OleDbParameter type
objects. Parameter name: value
and
Parameter ? _[#] has no default value
Most of my parameters are string objects that work fine when a value is assigned to them via a form. However, when a non-required field is left blank (ie someString = "") and the form is submitted, then the error occurs. I have looked around for answers on this site and others that mention possible solutions like:
OleDb uses ? instead of name values
Make sure the number of parameters matches the number of ?'s and that they are inserted in the right order.
Use command.Parameters.Add(new OleDbParameter("Name", OleDbType.VarChar, 50, "Column").Value = someString); or something along those lines.
Use command.Parameters.AddWithValue("parameterName", someString);
I could set the value of the string to "[space]", but then this removes the placeholder in the form, which is not ideal, and one I do not believe should be necessary. If I have to check for the empty string and add the space before adding the value to the parameter list, then I will, but I hope to avoid the extra code if possible.
Here is an example of the code I am using:
Customer.cs
public class Customer
{
[Required]
public string ContactFirstName { get; set; }
[Required]
public string ContactLastName { get; set; }
public string Email {get; set; }
public string Phone {get; set; }
public Customer()
{
this.ContactFirstName = "";
this.ContactLastName = "";
this.Email = "";
this.Phone = "";
}
}
Method used to insert data
public int InsertValues(Customer customer)
{
this.dbConn.Open(); //System.Data.OleDb.OleDbConnection
this.query = "INSERT INTO someTable (ContactFirstName, ContactLastName, Email, Phone) VALUES (?,?,?,?)";
this.dbComm = new OleDbCommand(this.query, this.dbConn); //System.Data.OleDb.OleDbCommand
//Add parameters
this.dbComm.Parameters.AddWithValue("ContactFirstName", customer.ContactFirstName);
this.dbComm.Parameters.AddWithValue("ContactLastName", customer.ContactLastName);
this.dbComm.Parameters.AddWithValue("Email", customer.Email);
this.dbComm.Parameters.AddWithValue("Phone", customer.Phone);
this.dbComm.ExecuteNonQuery();
//--Snip--
}
The ODBC driver I am using is a Microsoft.OleDb.ACE.12.0. Any help or information that could lead me in the right direction would be greatly appreciated.

change this
public int InsertValues(Customer customer)
{
this.dbConn.Open(); //System.Data.OleDb.OleDbConnection
this.query = "INSERT INTO someTable (ContactFirstName, ContactLastName, Email, Phone) VALUES (#ContactFirstName,#ContactLastName,#Email,#Phone)";
this.dbComm = new OleDbCommand(this.query, this.dbConn); //System.Data.OleDb.OleDbCommand
//Add parameters
this.dbComm.Parameters.AddWithValue("#ContactFirstName", customer.ContactFirstName);
this.dbComm.Parameters.AddWithValue("#ContactLastName", customer.ContactLastName);
this.dbComm.Parameters.AddWithValue("#Email", customer.Email);
this.dbComm.Parameters.AddWithValue("#Phone", customer.Phone);
this.dbComm.ExecuteNonQuery();
//--Snip--
}

I'm sure there may be other solutions to this problem, but this is one I have found through trial and error that adds a small amount of code, and which can be improved by making a method that will do this instead.
As pointed out in the OP and in Gökhan Girgin's response, the AddWithValue method should appear similar to:
OleDbCommandObject.Parameters.AddWithValue("Whatever you want here", Value);
Now, my main focus is on adding a string value to the parameter list that contains no value (i.e. in the form the user left the field blank). The string is simply blank as in "[no_space]". What appears to be happening is that upon submission of the form, this value is changed from "[no_space]" to null. Attempting to type cast the Value to a string type does not solve the problem. The solution I have found involved concatenating another blank string to the Value.
Any of the combinations below I have found work though this list is most likely not exhaustive. Make sure when adding parameters with OleDb that it is in the same order as your INSERT statement.
OleDbCommandObject.Parameters.AddWithValue("#Phone", "" + customer.Phone);
OleDbCommandObject.Parameters.AddWithValue("#Phone", customer.Phone + "");
OleDbCommandObject.Parameters.AddWithValue("#Phone", "" + customer.Phone + "");
Once again, to me it does not make sense that this needs to be done unless the value is changed to null on form submission because the string is already set to "[no_space]" in the constructor. I do not see how adding another "[no_space]" changes anything, but it was accepted and no error occurs. It will be greatly appreciated if anyone can shed light on why this works.
To others who have run into this issue, I hope this helps.