I want to create code where if for example the dropdown list is = to linemen then his monthly salary is = 6000 and I want this to be put into monthly salary column in my database.
Here is the code - with this code I get error in monthlysalary parameters saying
use of unassigned local variable total
Code:
float total;
if (Designation.SelectedValue == "Linemen")
{
total = 4000;
}
if (Designation.SelectedValue == "Manager")
{
total = 6000;
}
if (Designation.SelectedValue == "Boss")
{
total = 8000;
}
string emp = datapayemp.SelectedRow.Cells[1].Text;
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["connect"].ConnectionString);
string command = "INSERT INTO PAYROLL(RegEmpID, MonthlySalary) VALUES (#RegEmpID, #MonthlySalary)";
SqlCommand cmd = new SqlCommand(command, con);
cmd.Parameters.AddWithValue("#RegEmpID", emp);
cmd.Parameters.AddWithValue("#MonthlySalary",total);
try
{
con.Open();
cmd.ExecuteNonQuery();
}
finally
{
con.Close();
}
Well, the problem is: you're not initializing total to any value - and if the Designation.SelectedValue is neither Linemen, Manager nor Boss, then there's never any value assigned to total.
You need to give that total an initial value, just in case none of the if clauses match:
float total = 0.0;
Also: float is notorious for rounding errors etc. - so if you're dealing with money values, I would strongly recommend to use the decimal datatype instead. Same goes for the SQL Server database table: don't use FLOAT or REAL - use DECIMAL(p,s) instead
Related
I tried to count num of rows in grid in runtime with this code
FormRun caller;
FormDataSource fds;
QueryRun queryRun;
int64 rows;
fds = caller.dataSource();
query = fds.query();
queryRun = new QueryRun(query);
rows = SysQuery::countTotal(queryRun); //this returns -1587322268
rows = SysQuery::countLoops(queryRun); //this returs 54057
The last line of code is closest to what i need because there are 54057 lines but if i add filters it still returns 54057.
I want logic to get the number rows that grid has in the moment of calling the method.
Your query has more than one datasource.
The best way to explain your observation is to look at the implementation of countTotal and countLoops.
public client server static Integer countTotal(QueryRun _queryRun)
{
container c = SysQuery::countPrim(_queryRun.pack(false));
return conpeek(c,1);
}
public client server static Integer countLoops(QueryRun _queryRun)
{
container c = SysQuery::countPrim(_queryRun.pack(false));
return conpeek(c,2);
}
private server static container countPrim(container _queryPack)
{
...
if (countQuery.dataSourceCount() == 1)
qbds.addSelectionField(fieldnum(Common,RecId),SelectionField::Count);
countQueryRun = new QueryRun(countQuery);
while (countQueryRun.next())
{
common = countQueryRun.get(countQuery.dataSourceNo(1).table());
counter += common.RecId;
loops++;
}
return [counter,loops];
}
If your datasource contains one datasource it adds count(RecId).
countTotal returns the number of records.
countLoops returns 1.
Pretty fast, as fast as the SQL allows.
If your datasource contains more than one datasource it does not add count(RecId).
countTotal returns the sum of recIds (makes no sense).
countLoops returns the number of records.
Also countLoops is slow if there are many records as they are counted one by one.
If you have two datasources and want a fast count, you are on your own:
fds = caller.dataSource();
queryRun = new QueryRun(fds.queryRun().query());
queryRun.query().dataSourceNo(2).joinMode(JoinMode::ExistsJoin);
queryRun.query().dataSourceNo(1).clearFields();
queryRun.query().dataSourceNo(1).addSelectionField(fieldnum(Common,RecId),SelectionField::Count);
queryRun.next();
rows = queryRun.getNo(1).RecId;
The reason your count did not respect the filters was because you used datasource.query() rather than datasource.queryRun().query(). The former is the static query, the latter is the dynamic query with user filters included.
Update, found some old code with a more general approach:
static int tableCount(QueryRun _qr)
{
QueryRun qr;
Query q = new Query(_qr.query());
int dsN = _qr.query().dataSourceCount();
int ds;
for (ds = 2; ds <= dsN; ++ds)
{
if (q.dataSourceNo(ds).joinMode() == JoinMode::OuterJoin)
q.dataSourceNo(ds).enabled(false);
else if (q.dataSourceNo(ds).joinMode() == JoinMode::InnerJoin)
{
q.dataSourceNo(ds).joinMode(JoinMode::ExistsJoin);
q.dataSourceNo(ds).fields().clearFieldList();
}
}
q.dataSourceNo(1).fields().clearFieldList();
q.dataSourceNo(1).addSelectionField(fieldNum(Common,RecId), SelectionField::Count);
qr = new QueryRun(q);
qr.next();
return any2int(qr.getNo(1).RecId);
}
I have this code
using (var contents = connection.CreateCommand())
{
contents.CommandText = "SELECT [subject],[note] FROM tasks";
var r = contents.ExecuteReader();
int zaehler = 0;
int zielzahl = 5;
while (r.Read())
{
if (zaehler == zielzahl)
{
//access r["subject"].ToString()
}
zaehler++;
}
}
I want to make it faster by accessing zielzahl directly like r[zielzahl] instead of iterating through all entries. But
r[zielzahl]["subject"]
does not work aswell as
r["subject"][zielzahl]
How do I access the column subject of result number zielzahl?
To get only the sixth record, use the OFFSET clause:
SELECT subject, note
FROM tasks
LIMIT 1 OFFSET 5
Please note that the order of returned records is not guaranteed unless you use the ORDER BY clause.
I have a text file that contains around 21 lac entries and I want to insert all these entries into a table. Initially I have created one function in c# that read line by line and insert into table but it takes too much time. Please suggest an efficient way to insert these bulk data and that file is containing TAB(4 spaces) as delimiter.
And that text file also containing some duplicate entries and I don't want to insert those entries.
Load all of your data into a DataTable object and then use SqlBulkCopy to bulk insert them:
DataTable dtData = new DataTable("Data");
// load your data here
using (SqlConnection dbConn = new SqlConnection("db conn string"))
{
dbConn.Open();
using (SqlTransaction dbTrans = dbConn.BeginTransaction())
{
try
{
using (SqlBulkCopy dbBulkCopy = new SqlBulkCopy(dbConn, SqlBulkCopyOptions.Default, dbTrans))
{
dbBulkCopy.DestinationTableName = "intended SQL table name";
dbBulkCopy.WriteToServer(dtData );
}
dbTrans.Commit();
}
catch
{
dbTrans.Rollback();
throw;
}
}
dbConn.Close();
}
I've included the example to wrap this into a SqlTransaction so there will be a full rollback if there's a failure along the way. To get you started, here's a good CodeProject article on loading the delimited data into a DataSet object.
Sanitizing the data before loading
OK, here's how I think your data looks:
CC_FIPS FULL_NAME_ND
AN Xixerella
AN Vila
AN Sornas
AN Soldeu
AN Sispony
... (cut down for brevity)
In this instance you want to create your DataTable like this:
DataTable dtData = new DataTable("Data");
dtData.Columns.Add("CC_FIPS");
dtData.Columns.Add("FULL_NAME_ND");
Then you want to iterate each row (assuming your tab delimited data is separated row-by-row by carriage returns) and check whether this data already exists in the DataTable using the .Select method and if there is a match (i'm checking for BOTH values, it's up to you whether you want to do something else) then don't add it thereby preventing duplicates.
using (FileStream fs = new FileStream("path to your file", FileMode.Open, FileAccess.Read))
{
int rowIndex = 0;
using (StreamReader sr = new StreamReader(fs))
{
string line = string.Empty;
while (!sr.EndOfStream)
{
line = sr.ReadLine();
// use a row index to skip the header row as you don't want to insert CC_FIPS and FULL_NAME_ND
if (rowIndex > 0)
{
// split your data up into a 2-d array tab delimited
string[] parts = line.Split('\t');
// now check whether this data has already been added to the datatable
DataRow[] rows = dtData.Select("CC_FIPS = '" + parts[0] + "' and FULL_NAME_ND = '" + parts[1] + "'");
if (rows.Length == 0)
{
// if there're no rows, then the data doesn't exist so add it
DataRow nr = dtData.NewRow();
nr["CC_FIPS"] = parts[0];
nr["FULL_NAME_ND"] = parts[1];
dtData.Rows.Add(nr);
}
}
rowIndex++;
}
}
}
At the end of this you should have a sanitized DataTable that you can bulk insert. Please note that this code isn't tested, but it's a best guess as to how you should do it. There are many ways this can be done, and probably a lot better than this method (specifically LINQ) - but it's a starting point.
Im writing SSAS MDX queries involving more than 2 axis' to retrieve a value. Using ADOMD.NET, I can get the returned cellset and determine the value by using
lblTotalGrossSales.Text = CellSet.Cells(0).Value
Is there a way I can get the CellSet's Cell(0) Value in my MDX query, instead of relying on the data returning to ADOMD.NET?
thanks!
Edit 1: - Based on Daryl's comment, here's some elaboration on what Im doing. My current query is using several axis', which is:
SELECT {[Term Date].[Date Calcs].[MTD]} ON 0,
{[Sale Date].[YQMD].[DAY].&[20121115]} ON 1,
{[Customer].[ID].[All].[A612Q4-35]} ON 2,
{[Measures].[Loss]} ON 3
FROM OUR_CUBE
If I run that query in Management Studio, I am told Results cannot be displayed for cellsets with more than two axes - which makes sense since.. you know.. there's more than 2 axes. However, if I use ADOMD.NET to run this query in-line, and read the returning value into an ADOMD.NET cellset, I can check the value at cell "0", giving me my value... which as I understand it (im a total noob at cubes) is the value sitting where all these values intersect.
So to answer your question Daryl, what I'd love to have is the ability to have the value here returned to me, not have to read in a cell set into the calling application. Why you may ask? Well.. ultimately I'd love to have one query that performs several multi-axis queries to return the values. Again.. Im VERY new to cubes and MDX, so it's possible Im going at this all wrong (Im a .NET developer by trade).
Simplify your query to return two axis;
SELECT {[Measures].[Loss]} ON 0, {[Term Date].[Date Calcs].[MTD] * [Sale Date].[YQMD].[DAY].&[20121115] * [Customer].[ID].[All].[A612Q4-35]} ON 1 FROM OUR_CUBE
and then try the following to access the cellset;
string connectionString = "Data Source=localhost;Catalog=AdventureWorksDW2012";
//Create a new string builder to store the results
System.Text.StringBuilder result = new System.Text.StringBuilder();
AdomdConnection conn = new AdomdConnection(connectionString);
//Connect to the local serverusing (AdomdConnection conn = new AdomdConnection("Data Source=localhost;"))
{
conn.Open();
//Create a command, using this connection
AdomdCommand cmd = conn.CreateCommand();
cmd.CommandText = #"SELECT { [Measures].[Unit Price] } ON COLUMNS , {[Product].[Color].[Color].MEMBERS-[Product].[Color].[]} * [Product].[Model Name].[Model Name]ON ROWS FROM [Adventure Works] ;";
//Execute the query, returning a cellset
CellSet cs = cmd.ExecuteCellSet();
//Output the column captions from the first axis//Note that this procedure assumes a single member exists per column.
result.Append("\t\t\t");
TupleCollection tuplesOnColumns = cs.Axes[0].Set.Tuples;
foreach (Microsoft.AnalysisServices.AdomdClient.Tuple column in tuplesOnColumns)
{
result.Append(column.Members[0].Caption + "\t");
}
result.AppendLine();
//Output the row captions from the second axis and cell data//Note that this procedure assumes a two-dimensional cellset
TupleCollection tuplesOnRows = cs.Axes[1].Set.Tuples;
for (int row = 0; row < tuplesOnRows.Count; row++)
{
for (int members = 0; members < tuplesOnRows[row].Members.Count; members++ )
{
result.Append(tuplesOnRows[row].Members[members].Caption + "\t");
}
for (int col = 0; col < tuplesOnColumns.Count; col++)
{
result.Append(cs.Cells[col, row].FormattedValue + "\t");
}
result.AppendLine();
}
conn.Close();
TextBox1.Text = result.ToString();
} // using connection
Source : Retrieving Data Using the CellSet
This is fine upto select on columns and on Rows. It will be helpful analyze how to traverse sub select queries from main query.
I'm trying to do a search on a table in my database where it returns the top 50 rows with a firstname like the search term being passed to the function, but its always returning the same 50 results
My sql looks like this:
Select TOP(50) *
FROM [database].[dbo].[records]
WHERE (A_1STNAME LIKE '" + #searchTerm + "%')
ORDER BY A_RECID
When I run this query in Visual Studios query window, it works as expected but when I run it through my ASP.NET application, it always returns the same 50 results, and only one of them has a first name close to the searchTerm I passed to it.
here is the page code that runs the function:
protected void Page_Load(object sender, EventArgs e)
{
_migrated_data data = new _migrated_data();
DataSet ds = data.Search(Request.QueryString.Get("query"), "A_RECID", 50);
if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)
{
rpt_Data.DataSource = ds.Tables[0].DefaultView;
rpt_Data.DataBind();
}
}
and here is the search method of _migrated_data:
public DataSet Search(String #pSearchTerm, String #pSortBy, int #pRowCount)
{
DataSet ds = new DataSet();
OleDbConnection objOleDBConn;
OleDbDataAdapter objOleDBDa;
objOleDBConn = new OleDbConnection(ClearingHouse_OLEDDB);
objOleDBConn.Open();
string lSQL = "SELECT TOP(50) * FROM [database].[dbo].[records]";
lSQL += " WHERE (A_1STNAME LIKE #searchTerm ) ORDER BY #sortBy";
SqlCommand t = new SqlCommand(lSQL);
if (pSearchTerm != null && pSearchTerm != "")
{
t.Parameters.AddWithValue("#searchTerm", #pSearchTerm + "%");
}
if (pSortBy != null && pSortBy != "")
{
t.Parameters.AddWithValue("#sortBy", #pSortBy);
}
else
{
t.Parameters.AddWithValue("#sortBy", "A_RECID");
}
objOleDBDa = new OleDbDataAdapter(t.CommandText, objOleDBConn);
objOleDBDa.SelectCommand.CommandType = CommandType.Text;
objOleDBDa.Fill(ds);
objOleDBConn.Close();
return ds;
}
Using locals to view the final CommandText of t, I get the sql results I gave above.
Any help is greatly appriciated :)
AS Rob Rodi said, first of all, to get the results begining with a value you will need % char at the end of the therm:
Select TOP(50) *
FROM [database].[dbo].[records]
WHERE (A_1STNAME LIKE '" + #searchTerm + "%')
ORDER BY A_RECID
Second, probably your searchTerm is empty, so it's grabbing always the same results.
Debug your app and watch the variable to see if it's receiving some value.
You are having SQL injection there. Also it looks like the %-signs are missing.
The fact, that the query works in a query window and not in your app means, that the error is not in your query! Did you think about that? Probably, you should post code of your ASP.NET app.
It sounds like your parameter isn't being correctly passed to your data layer. Easiest way to find out if that's the case is to turn on Sql Profiler and check to see if it's being passed. If it is, your sql's to blame. If it's not, it's your application. You can then use the debugger on your application to work your way up the stack to see where the problem lies.