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How to return IQueryable from an SQL expression?

I am getting the following error trying to query from my database using C#:
LINQ to Entities does not recognize the method 'MyProject.Models.DB.Department getDepartment()' method, and this method cannot be translated into a store expression.
In my controller I have:
var query = db.Activities.AsQueryable();
query = query.Where(x => rs.department.Contains(x.getDepartment().id));
In my model I have the following method which returns the correct Department for an Activity. I know the problem is that I am executing the query when I do the .First(), but I can't find a way to return this as a IQueryable result:
public partial class Activity
{
public Department getDepartment()
{
return db.Departments.SqlQuery( "" +
"SELECT * FROM " +
"[snt].[Departments] " +
"INNER JOIN( " +
"SELECT " +
"[Users].departments_id AS id " +
"FROM " +
"[snt].[Users], " +
"[snt].[People], " +
"[snt].[EventPerson], " +
"[snt].[EventPersonTask], " +
"[snt].[Tasks], " +
"[snt].[Events], " +
"[snt].[Activities] " +
"WHERE " +
"[snt].[Activities].id = {0} AND " +
"[snt].[Events].id = [snt].[Activities].events_id AND " +
"[snt].[EventPerson].events_id = [snt].[Events].id AND " +
"[snt].[EventPerson].people_id = [snt].[People].id AND " +
"[snt].[EventPersonTask].tasks_id = [snt].[Tasks].id AND " +
"[snt].[EventPersonTask].eventperson_id = [snt].[EventPerson].id AND " +
"[snt].[Tasks].name = 'owner' AND " +
"[snt].[Users].is_active = 1 AND " +
"[snt].[Users].people_id = [snt].[People].id" +
" ) AS x " +
"ON " +
"x.id = [Departments].id", this.id).First();
}
}

HttpClient put issue in Angular

I'm developing an Angular app with Web api.
I have created a service (sellerService) in which I can update some data in my database with HttpClient put.
Above works but it update all the data of my table, something like follows;
Before I update my seller:
After I update my seller:
My sellerService code:
updateSeller(user: string, nbsales: number, pVote: number, nVote: number, idUser: number): Observable<any> {
return this.http.put('http://localhost:50867/api/seller_user/', {
'username': user,
'nbSales': nbsales,
'positiveVote': pVote,
'negativeVote': nVote,
'idUser': idUser
});
}
My update query (DAO (c#)):
public static readonly string UPDATE = "update " + TABLE_NAME + " set "
+ COLUMN_USERNAME + " =#username"
+ ", " + COLUMN_NB_SALES + "=#nbSales"
+ ", " + COLUMN_POSITIVE_VOTE + "=#positiveVote"
+ ", " + COLUMN_NEGATIVE_VOTE + " =#negativeVote"
+ ", " + COLUMN_ID_USER + "=#idUser";
//Update a seller_user
public static bool Update(Seller_user todo)
{
bool state = false;
using (SqlConnection connection = DataBase.GetConnection())
{
connection.Open();
SqlCommand command = new SqlCommand(UPDATE, connection);
//command.Parameters.AddWithValue("#idSeller", todo.idSeller);
command.Parameters.AddWithValue("#username", todo.username);
command.Parameters.AddWithValue("#nbSales", todo.nbSales);
command.Parameters.AddWithValue("#positiveVote", todo.positiveVote);
command.Parameters.AddWithValue("#negativeVote", todo.negativeVote);
command.Parameters.AddWithValue("#idUser", todo.idUser);
state = command.ExecuteNonQuery() != 0;
}
return state;
}
Thanks in advance ;)

You missed where clause in SQL query. So it will update all records.
public static readonly string UPDATE = "update " + TABLE_NAME + " set "
+ COLUMN_USERNAME + " =#username"
+ ", " + COLUMN_NB_SALES + "=#nbSales"
+ ", " + COLUMN_POSITIVE_VOTE + "=#positiveVote"
+ ", " + COLUMN_NEGATIVE_VOTE + " =#negativeVote"
+ ", " + COLUMN_ID_USER + "=#idUser"
+ "WHERE " + COLUMN_ID_USER + "=" + "= #idUser";

How to populate treenode from SQL using C#

I inherited a project that is populating TreeNode from SQL. I want to add three columns but syntax checker doesn't like what I'm adding but appears consistent with examples in blogs.
TreeNode field = new TreeNode(rdr["VistaFieldNumber"].ToString() + " - " + rdr["VistaFieldName"].ToString()); // current working code
TreeNode field = new TreeNode(rdr["VistaFieldNumber"].ToString() + " - " + rdr["VistaFieldName"].ToString() + " - " + rdr["FieldType"].ToString() + " - " + rdr["PointsToFileNumber"].ToString() + " - " + rdr["FieldLength"].ToString()); //possible replacement code that works but I would have to parse it later
TreeNode field = new TreeNode(rdr["VistaFieldNumber"].ToString() + " - " + rdr["VistaFieldName"].ToString(), rdr["FieldType"].ToString(), rdr["PointsToFileNumber"].ToString(), rdr["FieldLength"].ToString()); //bad syntax beginning at first comma
Method:
private void getFileManFields(TreeNode node)
{
node.Nodes.Clear();
String fileNumber = node.Tag.ToString();
String sta3n = cbRegionSites.SelectedItem.ToString().Substring(1, 3);
SqlConnection cdw = new SqlConnection(ConfigurationManager.ConnectionStrings["CDW"].ConnectionString);
cdw.Open();
//SqlCommand cmd = new SqlCommand("SELECT VistaFieldNumber,VistaFieldName,MultipleFileNumber FROM CDWWork.Dim.VistaField WHERE Sta3n=" + sta3n + " AND VistaFileNumber='" + fileNumber + "' ORDER BY CAST(VistaFieldNumber As NUMERIC(30,10))", cdw);
SqlCommand cmd = new SqlCommand("SELECT VistaFieldNumber,VistaFieldName,MultipleFileNumber,FieldType,PointsToFileNumber,FieldLength FROM CDWWork.Dim.VistaField WHERE Sta3n=" + sta3n + " AND VistaFileNumber='" + fileNumber + "' ORDER BY CAST(VistaFieldNumber As NUMERIC(30,10))", cdw);
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
//TreeNode field = new TreeNode(rdr["VistaFieldNumber"].ToString() + " - " + rdr["VistaFieldName"].ToString());
//TreeNode field = new TreeNode(rdr["VistaFieldNumber"].ToString() + " - " + rdr["VistaFieldName"].ToString() + " - " + rdr["FieldType"].ToString() + " - " + rdr["PointsToFileNumber"].ToString() + " - " + rdr["FieldLength"].ToString());
TreeNode field = new TreeNode(rdr["VistaFieldNumber"].ToString() + " - " + rdr["VistaFieldName"].ToString(), rdr["FieldType"].ToString(), rdr["PointsToFileNumber"].ToString(), rdr["FieldLength"].ToString());
field.Tag = rdr["VistaFieldNumber"].ToString();
if (rdr["MultipleFileNumber"].ToString().Length > 0)
{
field.Tag = rdr["MultipleFileNumber"].ToString();
field.Nodes.Add("RemoveNode");
}
node.Nodes.Add(field);
}
rdr.Close();
rdr.Dispose();
cmd.Dispose();
cdw.Close();
cdw.Dispose();
}

header and footer in text file using c#

I am newbie to c# I want to have headers and footers when saving the text file which is generated on the data grid view.
when I run a sql query it should generate 3 column values as headers and 3 columns values as footers.
headers recordtype,cpcnumber,filesequence number;
footers record type,no of requests,total court fee,claim amount; I don't how to get these records when i run this command as headers/footers. Any help would be greatly appreciated..
private void btnGetData_Click(object sender, EventArgs e)
{
this.btnGetData.Enabled = false;
Application.DoEvents();
string stringSql = " SELECT distinct " +
"'" + comboBox6.Text + "' as RecordType" +
" , left([CPC No] +' ',30) " +
" , space(1983) " +
",'" + comboBox6.Text + " 'as RecordType" +
, left(t.t_reference + ' ' ,24 ) as ClaimantReference " +
" , left([Claim Number] +' ',30) " +
" , " + comboBox4.Text + " as CourtCode" +
" ,left(ta_title +' ',30) as Title " +
" ,left(ta_surname +' ',30) as Surname " +
", space(180), bat.PCN_Charge as ClaimAmount " +
",[Court Fee] " +
",[Solictors Fees]" +
", (bat.PCN_Charge + [Court Fee]) as TotalAmount" +
",[POC1]" +
",'" + textBox2.Text + "' as RequestType" +
//",'" + comboBox1.Text + "' as RecordType" +
",'" + textBox3.Text + "' as TotalCourtFee" +
",'" + textBox4.Text + "' as TotalClaimAmount" +
" , space(1966) " +
" FROM tickets t " +
" LEFT OUTER JOIN " +
"( " +
" SELECT ticket_addresses.ta_system_ref, ta_title, ta_othername, ta_surname, ta_house_number, ta_address_1, ta_address_2, " +
" ta_address_3, ta_address_4, ta_post_code, ta_telephone, ta_organisation " +
" FROM ticket_addresses " +
" INNER JOIN " +
" ( " +
" SELECT ticket_addresses.ta_system_ref, MAX(ta_address_code) AS ta_address_code " +
" FROM ticket_addresses " +
" GROUP BY ta_system_ref " +
" ) ad " +
" ON (ticket_addresses.ta_system_ref=ad.ta_system_ref AND ticket_addresses.ta_address_code=ad.ta_address_code) " +
")ta " +
"ON (t.t_number=ta.ta_system_ref) " +
" " +
" Inner JOIN " +
" ticket_hold_record b " +
" ON ( t.t_number = b.thr_system_ref) " +
" " +
"Inner JOIN " +
"Rpt_PCNBalance_ALLTickets bat " +
"ON (t.t_number = bat.t_number) " +
" " +
"Inner JOIN " +
"hold_reasons ch " +
"ON (b.thr_hold_type = ch.hr_code) " +
" " +
"Inner JOIN " +
" [VCS].[dbo].[Courtfees] cf " +
" ON (bat.Payments >= cf. [Min ClaimAmount]) and (bat.Payments <= cf.[Max Claim Amount]) " +
" " +
"Inner JOIN " +
" [VCS].[dbo].[sites] s " +
" ON (t.t_contract = s.Contract) " +
" " +
"Inner JOIN " +
" [VCS].[dbo].[claim info] cc " +
" ON (cc.Code COLLATE DATABASE_DEFAULT = t.t_offence_code COLLATE DATABASE_DEFAULT) " +
" and t.t_reference IN {where} ";
//Generate list of Ticket IDS for SQL Where Clause
string whereClause = "";
string[] tempArray = new string[this.txt.Lines.Length];
tempArray = this.txt.Lines;
if (this.txt.Lines.Length == 0)
{
return;
}
for (int counter = 0; counter <= tempArray.Length-1; counter++)
{
if (tempArray[counter].Trim().Length > 0)
{
whereClause = whereClause + "'" + tempArray[counter] + "'" + ", ";
}
}
whereClause = whereClause.TrimEnd(' ', ',');
whereClause = "(" + whereClause + ")";
stringSql = stringSql.Replace("{where}", whereClause);
myDataset = new DataSet("SQL");
SqlConnection myConn = new SqlConnection();
SqlCommand myCommand = new SqlCommand();
myCommand.CommandType = CommandType.Text;
myCommand.CommandText = stringSql;
myCommand.Connection = myConn;
SqlDataAdapter myAdapter = new SqlDataAdapter();
myAdapter.SelectCommand = myCommand;
myAdapter.Fill(myDataset);
this.dataGridView1.DataSource = myDataset.Tables[0];
for (int counter = 0; counter < myDataset.Tables[0].Columns.Count; counter++)
{
this.dataGridView1.Columns[counter].SortMode = DataGridViewColumnSortMode.NotSortable;
}
this.dataGridView1.Refresh();
myConn.Close(); this.btnGetData.Enabled = true;
this.btnSave.Enabled = true;
Application.DoEvents();
}

"Attempted to read or write protected memory" when filling a DataTable

I am developing some reports using ReportViewer and at certain point I have to connect to an Oracle database to retrieve some data and store it in a DataTable.
When the DataAdapter executes the Fill method I get this error:
"Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
Here's the code(unfortunatelly I can't put that sql code inside a procedure or something):
OleDbConnection objConn = new OleDbConnection(ConfigurationManager.ConnectionStrings["Premio"].ConnectionString);
OleDbCommand objCmd = new OleDbCommand();
DataTable objDt = new DataTable();
int vTipoTerr = LoadTipoTerritorio(ReportParameter.ReportData.Parameters.Item("pTerritorio").Value.ToString());
string vDataParametroDataFinal = ReportParameter.ReportData.Parameters.Item("pMesAnoCompetencia").Value.ToString();
int vDataInicial = int.Parse(vDataParametroDataFinal.Substring(0, 4));
vDataInicial = vDataInicial - 1;
vDataInicial = int.Parse(vDataInicial.ToString() + vDataParametroDataFinal.Substring(4, 2));
objCmd.CommandText = "SELECT T.Nome, " +
" T.Prontuario, " +
" C.Cobertura, " +
" Cn.Mesano_competencia, " +
" G.Grupo, " +
" T.Territorio, " +
" N.Negocio " +
" FROM Calculo C " +
" Inner Join Territorio T " +
" ON C.Id_Territorio = T.Id_Territorio " +
" Inner Join Grupo G " +
" ON C.Id_Grupo = G.Id_Grupo " +
" Inner Join Cenario Cn " +
" On Cn.Id_cenario = C.Id_cenario " +
" Inner Join Negocio N " +
" On Cn.Id_negocio = N.Id_negocio " +
" Where Cn.Mesano_competencia Between :p1 And :p2 --datas " +
" And G.Grupo = :p3 " +
" And Sub_terr(T.Territorio, Decode(:p4, 1, 'SETOR', 2, 'DISTRITO', 3, 'REGIONAL')) = :p5 " +
" And (Cn.Flag_cenario_disp = 1 Or Cn.Flag_cenario_disp_rec = 1) " +
" And N.Negocio = :p6 " +
" And Cn.Flag_recuperacao = 0 " +
" Order By Cn.Mesano_competencia; " +
"union all " +
"SELECT T.Nome, " +
" T.Prontuario, " +
" C.Cobertura, " +
" Cn.Mesano_competencia, " +
" G.Grupo, " +
" T.Territorio, " +
" N.Negocio " +
" FROM Calculo_Rec C " +
" Inner Join Territorio T " +
" ON C.Id_Territorio = T.Id_Territorio " +
" Inner Join Grupo G " +
" ON C.Id_Grupo = G.Id_Grupo " +
" Inner Join Cenario Cn " +
" On Cn.Id_cenario = C.Id_cenario " +
" Inner Join Negocio N " +
" On Cn.Id_negocio = N.Id_negocio " +
" Where Cn.Mesano_competencia Between :p1 And :p2 " +
" And G.Grupo = :p3 " +
" And Sub_terr(T.Territorio, Decode(:p4, 1, 'SETOR', 2, 'DISTRITO', 3, 'REGIONAL')) = :p5 " +
" And (Cn.Flag_cenario_disp = 1 Or Cn.Flag_cenario_disp_rec = 1) " +
" And N.Negocio = :p6 " +
" And Cn.Flag_recuperacao = 1 " +
" Order By Cn.Mesano_competencia ";
objCmd.Parameters.Add(new OleDbParameter("p1", OleDbType.Integer)).Value = vDataInicial;
objCmd.Parameters.Add(new OleDbParameter("p2", OleDbType.Integer)).Value = int.Parse(vDataParametroDataFinal);
objCmd.Parameters.Add(new OleDbParameter("p3", OleDbType.VarChar, 30)).Value = ReportParameter.ReportData.Parameters.Item("pGrupo").Value.ToString();
objCmd.Parameters.Add(new OleDbParameter("p4", OleDbType.Integer)).Value = vTipoTerr;
objCmd.Parameters.Add(new OleDbParameter("p5", OleDbType.VarChar, 30)).Value = ReportParameter.ReportData.Parameters.Item("pTerritorio").Value.ToString();
objCmd.Parameters.Add(new OleDbParameter("p6", OleDbType.VarChar, 30)).Value = ReportParameter.ReportData.Parameters.Item("pNegocio").Value.ToString();
OleDbDataAdapter objAdapter = new OleDbDataAdapter(objCmd);
objConn.Open();
objAdapter.Fill(objDt);
objConn.Close();
Thank you very much (:

Try using OracleCommand and OracleConnection objects instead:
OracleConnection objConn = new OracleConnection (ConfigurationManager.ConnectionStrings["Premio"].ConnectionString);
OracleCommand objCmd = new OracleCommand ();