I have this method and I have not been able to order my result. It wont order at all.
Do you know what am doing wrong ?
public IEnumerable<SelectListItem> GetBranches()
{
List<SelectListItem> objList = null;
var strQuery = (from sl in _objDataCollection.Edmm_Tester
orderby sl.Code
select new SelectListItem() {Text = sl.Name, Value = sl.Code}).Distinct();
objList = strQuery.ToList();
return objList;
}
use this:
objList = strQuery.OrderBy(e=>e.Code).ToList();
Or this:
var strQuery = (from sl in _objDataCollection.Edmm_Tester
select new SelectListItem()
{
Text = sl.Name
, Value = sl.Code
}).OrderBy(e=>e.Code).Distinct();
Related
I have mysql Database and i want to read data from there in my web application with for loop instead of foreach loop.
MySqlConnection conn = new MySqlConnection(connStr);
conn.Open();
string query = "SELECT * FROM survey ORDER BY datetime DESC";
MySqlCommand com = new MySqlCommand(query, conn);
com.CommandTimeout = 0;
MySqlDataAdapter da = new MySqlDataAdapter(com);
DataTable ds = new DataTable();
da.Fill(ds);
conn.Close();
foreach (DataRow item in ds.Rows)
{
string unique = item.ItemArray[4].ToString();
var sur = db2.VoipSurveys.Where(a => a.UniqueId == unique).SingleOrDefault();
if (sur == null)
{
VoipSurvey vs = new VoipSurvey()
{
Date = Convert.ToDateTime(item.ItemArray[1]),
Point = Convert.ToInt32(item.ItemArray[2]),
CallerId = item.ItemArray[3].ToString(),
UniqueId = item.ItemArray[4].ToString(),
AgentNumber = item.ItemArray[5].ToString(),
AgentName = item.ItemArray[6].ToString(),
QueueNumber = item.ItemArray[7].ToString()
};
db2.VoipSurveys.Add(vs);
db2.SaveChanges();
}
}
I need reading data from specific index like reading data in mysql table from this Date until now. and i think my problem would be solved with for loop
You can use a DataView RowFilter also:
// Create a DataView
DataView dv = new DataView(dt);
dv.RowFilter = " (Date >= #" +
Dateyouwanttouse +
"# And Date <= #" +
DateTime.Now +
"# ) ";
Simply do this:
foreach (DataRowView rowView in dv)
{
DataRow row = rowView.Row;
// Do something //
}
I am doing a query to the database prepared statement but its just not coming out right.
i get this error when I print my statement.
com.mysql.jdbc.JDBC42PreparedStatement#157b62f9: SELECT * FROM 2015-wind WHERE TimeStamp BETWEEN '2015-01-01' AND '2015-01-25' AND ConnectingArea IN (** NOT SPECIFIED **)
10YAT-APG--L (I print my string and it give me an output).
Anybody knows whats going on here ?
public List<Wind2015> getResultsWind(String beginDate1, String endDate1, String[] connectingAreas1) throws Exception{
int count = 0;
List<Wind2015> myWind2015s = new ArrayList<>();
SimpleDateFormat readFormat = new SimpleDateFormat("EE MMM dd HH:mm:ss z yyyy",
Locale.ENGLISH);
Date date2 = readFormat.parse(beginDate1);
Date date3 = readFormat.parse(endDate1);
String beginDate = new SimpleDateFormat("yyyy-MM-dd").format(date2);
String endDate = new SimpleDateFormat("yyyy-MM-dd").format(date3);
ArrayList<String> connectingArea = new ArrayList<>(Arrays.asList(connectingAreas1));
StringBuilder inputs = new StringBuilder();
for (int i = 0; i < connectingArea.size(); i++) {
if (i < connectingArea.size()-1) {
inputs.append("?,");
} else {
inputs.append("?");
}
}
String connectingAreaInputs = inputs.toString();
Connection connection = null;
PreparedStatement prepareStatement = null;
ResultSet myRs = null;
System.out.println(connectingAreaInputs);
try {
connection = getConnection();
String sql = "SELECT * FROM `2015-wind` WHERE `TimeStamp` BETWEEN ? AND ? AND `ConnectingArea` IN ("+ connectingAreaInputs +")";
prepareStatement = connection.prepareStatement(sql);
prepareStatement.setString(count+=1,beginDate);
prepareStatement.setString(count+=1, endDate);
System.out.println(prepareStatement);
for (String string : connectingArea) {
System.out.println(string);
count+=1;
prepareStatement.setString(count, string);
}
myRs = prepareStatement.executeQuery();
Wind2015 wind2015 = null;
while (myRs.next()) {
String timeStamp = myRs.getString("Timestamp");
String connectingArea1 = myRs.getString("ConnectingArea");
String value = myRs.getString("ActualWindEnergy");
wind2015 = new Wind2015(timeStamp, value, connectingArea1);
myWind2015s.add(wind2015);
}
return myWind2015s;
} finally {
close(connection, prepareStatement, myRs);
}
}
You're printing the prepared statement with this line:
System.out.println(prepareStatement);
before you assign value(s) to the dynamic placeholders in the IN (...) expression, so they're (correctly) displaying as "not [yet] specified".
Move the print statement to after the for loop that it currently sits before.
enter code here string customerName = Request.Form[txtSearch.UniqueID];
string customerId = Request.Form[hfCustomerId.UniqueID];
Label1.Enabled = true;
Label1.Text = customerName;
DataRow dr = GetData("SELECT * FROM actor where first_name = " +txtSearch.Text.ToString() ).Rows[0];
Document document = new Document(PageSize.A4, 88f, 88f, 10f, 10f);
Font NormalFont = FontFactory.GetFont("Arial", 12, Font.NORMAL, Color.BLACK);
Is there any problem with mysql syntax?
Correct me if i am going wrong.
While i am searching with a specified value, this runs perfectly. But creating problem when trying to pass a value.
try this:
DataRow dr = GetData("SELECT * FROM actor where first_name = '" +txtSearch.Text+"' ).Rows[0];
I am trying to write a query to show all records owned by the current logged on user but i am having issues inserting the "userid" variable into the string?
#{
Layout = "~/_template1.cshtml";
var db = Database.Open("StayInFlorida");
var userid = WebSecurity.CurrentUserId;
var premierproperty = "SELECT PropertyName, PropertyID FROM PropertyInfo WHERE OwnerID='userid'";
}
<h1>Properties - Page coming soon</h1>
#userid
#foreach (var row in db.Query(premierproperty)){
#row.propertyname
}
Any ideas?
Try like this:
#{
Layout = "~/_template1.cshtml";
var db = Database.Open("StayInFlorida");
var userid = WebSecurity.CurrentUserId;
var premierproperty = "SELECT PropertyName, PropertyID FROM PropertyInfo WHERE OwnerID = #0";
}
<h1>Properties - Page coming soon</h1>
#userid
#foreach (var row in db.Query(premierproperty, userid))
{
#row.propertyname
}
While running the code it is giving error " Cannot find column [max]." but i have added the max and min column to the table in the dataset
MySql.Data.MySqlClient.MySqlConnection mycon = new MySqlConnection(GetConnectionString());
if (mycon.State != ConnectionState.Open)
{
string sqlCat = "SELECT * FROM out_of_mark_table";
string sqlProd = "SELECT * FROM scord_mark_table";
MySqlDataAdapter da = new MySqlDataAdapter(sqlCat, mycon);
DataSet ds = new DataSet();
try
{
mycon.Open();
da.Fill(ds, "out_of_mark_table");
da.SelectCommand.CommandText = sqlProd;
da.Fill(ds, "scord_mark_table");
}
finally
{
mycon.Close();
}
DataRelation relat = new DataRelation("CatProds", ds.Tables["out_of_mark_table"].Columns["test_id"], ds.Tables["scord_mark_table"].Columns["test_id"]);
ds.Relations.Add(relat);
DataColumn count = new DataColumn("Products (#)", typeof(int), "COUNT(Child(CatProds).test_id)");
DataColumn max = new DataColumn("Most Expensive Product", typeof(decimal), "MAX(Child(CatProds).total)");
DataColumn min = new DataColumn("Least Expensive Product", typeof(decimal), "MIN(Child(CatProds).total)");
DataColumn no=new DataColumn("No");
DataColumn IdCol = new DataColumn();
min.Caption = "min";
max.Caption = "max";
string expr = "max * min";
IdCol.ColumnName = "ID";
IdCol.DataType = Type.GetType("System.Int32");
IdCol.ReadOnly = true;
IdCol.AllowDBNull = false;
//IdCol.Unique = true;
IdCol.AutoIncrement = true;
IdCol.AutoIncrementSeed = 1;
IdCol.AutoIncrementStep = 1;
ds.Tables["out_of_mark_table"].Columns.Add(count);
ds.Tables["out_of_mark_table"].Columns.Add(max);
ds.Tables["out_of_mark_table"].Columns.Add(min);
ds.Tables["out_of_mark_table"].Columns.Add(IdCol);
DataColumn sum = new DataColumn("Sum of", typeof(int), expr, MappingType.Attribute);
**ds.Tables["out_of_mark_table"].Columns.Add(sum);**
IdCol.SetOrdinal(0);
GridView1.DataSource = ds.Tables["out_of_mark_table"];
GridView1.DataBind();
You have set the captions to "Max" and "Min", but the DataColumns's identifier is it's Ordinal or ColumnName. You have set the ColumnName via constructor to
"Most Expensive Product" and "Least Expensive Product"
So use
string expr = "[Most Expensive Product] * [Least Expensive Product]";
instead.