I'am new in MVC and I encountered this challenge. Where I have 2 queries but it is almost similar. One is for summary and other one is for drilldown.
What I want to achieve is to create two command text in one list controller, and control it by radio buttons.
The idea is something like this:
o Drilldown
o Summary
when I click the drilldown button, i will call the first query and vice versa with the summary.
My problem is I didn't know what's the right way to control this things.
[System.Web.Http.HttpPost]
public List<ChartData> GetData(STANDCST0058Criteria criteria)
{
List<ChartData> result = new List<ChartData>();
using (var mgr = WebDatabaseHelper.GetHelper())
{
PCommand cmd = mgr.GetSQLCommand();
string draw_myprojects = #"select distinct
p.projectno,
CAST(sum ((cp.samplecost1) / 1000) AS DECIMAL(12,0)) as SC_1,
CAST(sum ((cp.samplecost2) / 1000) AS DECIMAL(12,0)) as SC_2
GROUP BY p.projectno";
string draw_summary = #"SELECT
CAST(sum ((cp.samplecost1) / 1000) AS DECIMAL(12,0)) as SC_1,
CAST(sum ((cp.samplecost2) / 1000) AS DECIMAL(12,0)) as SC_2";
cmd.AddParameter("#projectId", criteria.Project);
var dr = cmd.ExecuteReader();
while (dr.Read())
{
result.Add(new ChartData()
{
ProjectNo = dr.GetString("ProjectNo"),
SC_1 = dr.GetDecimal("SC_1"),
SC_2 = dr.GetDecimal("SC_2"),
});
}
dr.Close();
}
return result;
}
Related
I have a controller that accepts a list of strings. THese strings essentially are IDs that a user selects on the view. I need to build the model based upon fields from to tables, hence the need for the join. The bellow code will not build as it claims the properties from the joined table do not exist. It only accepts table 1 values. Item.Well_No and Item.Well_Name throw the error. These are included in the "y" table that i joined to "x"..
[HttpPost]
public ActionResult buildSelectionTable(List<string> dta)
{
var a = from x in db._AGREEMENTS
join y in db.WELL_AGMT_XREF on x.AGMT_NUM equals y.AGMT_NUM
where dta.Contains(x.AGMT_NUM)
select x;
List<AgmtModel> model = new List<AgmtModel>();
foreach (var item in a)
{
model.Add(new AgmtModel { Agmt_Name = item.AGMT_NAME, Agmt_Num = item.AGMT_NUM, Agmt_Type = item.AGMT_TYPE_DESCR, Amnt_Status = item.AGMT_STAT_DESCR, Company = item.CO_NAME, DaysToExp = item.DaysToExp, Drs_Url = item.DRS_URL, Effective_Date = item.EFF_DT, Orig_Lessee = item.ORIG_LESSEE, Prop_Status = item.AGMT_PROP_STAT_DESCR, Expiration_Date = item.EXPR_DATE, Acreage = item.LGL_AREA, Extention_Expiration = item.EXTN_EXPR_DT, WellNo = item.WELL_NO, Well_Name = item.WELL_NAME });
}
return PartialView("_SelectionTable", model);
}
You are only selecting x in your query you need to also select y and reference it.
change select x to be select new { x, y}
and then
foreach (var item in a)
{
model.Add(new AgmtModel { Agmt_Name = item.y.AGMT_NAME, Agmt_Num = item.x.AGMT_NUM ... });
}
you need to insert .x or .y before you the field to determine the field names
alternatively you could actually put the constructor directly in the query
so instead of select x
select new AgmtModel { Agmt_Name = y.AGMT_NAME, etc...}
then you can just return PartialView("_SelectionTable", a.ToList())
I'm fairly new at MVC and linq and viewmodels in particular. I managed to get a create and index views to work. The "insert" wasn't as hard as the "list".
I have this linq query:
public ActionResult Index()
{
List<BlendElVM> BEVM = new List<BlendElVM>();
var list = (from Blend in db.blends
join BlendEl in db.blendEl on Blend.ID equals BlendEl.ID
select new
{
Blend.ID, Blend.Title, Blend.TransDt, BlendEl.Comment
}).ToList();
foreach (var item in list)
{
BlendElVM o = new BlendElVM(); // ViewModel
o.Comment = item.Comment;
o.Title = item.Title;
o.TransDt = item.TransDt;
o.ID = item.ID;
BEVM.Add(o);
}
return View(BEVM);
}
What I'm not sure about is the "foreach" section. When I'm running in debug, the "list" shows up fine, but if I comment out the "foreach" I get an error - ie not expecting the model. What does the foreach do? It has to do with the database, but I don't understand the where it is using the "o" and setting the columns. I thought it would all be in one linq query. Is it possible to combine the two and eliminate the "foreach"?
var BEVM = (from blend in db.blends
join BlendEl in db.blendEl on Blend.ID equals BlendEl.ID
select new BlendELVM
{
ID = blend.ID,
Title = blend.Title,
TransDT = blend.TransDt,
comment = blendEl.Comment
}).ToList();
I believe that the foreach is needed in order to read every element in the object so in this case you have:
BlendElVM o = new BlendElVM();
So you're creating and object named " o " of the type BlendELVM and this object contains all the attributes that you declared before which are: ID, Title, TransDT, etc
When you put:
foreach (var item in list)
{
BlendElVM o = new BlendElVM(); // ViewModel
o.Comment = item.Comment;
o.Title = item.Title;
o.TransDt = item.TransDt;
o.ID = item.ID;
BEVM.Add(o);
}
You're assigning to the new object o the item that you're reading in the list and in the end adding it to the BVEM list and answering if you can combine them i will say no because at first you're declaring the query and then you're reading the items on the list and assining them to the BEVM list
Controller
foreach (DataRow temp in act.Rows)
{
_oResolutionModel.activityNo = temp["ActivityID"].ToString();
_oResolutionModel.assignTechnician = temp["TechNo"].ToString();
_oResolutionModel.recommendation = temp["RECOMMENDATION"].ToString();
_oResolutionModel.jobStart = (DateTime)temp["JobStart"];
_oResolutionModel.jobEnd = (DateTime)temp["JobEnd"];
_oResolutionFacade.setResolutionID(_oResolutionModel.activityNo);
DataTable res = _oResolutionFacade.getResolution(_oAppSetting.ConnectionString);
foreach (DataRow x in res.Rows)
{
_oResolutionModel.solution = x["Resolution"].ToString();
_oResolutionModel.remarks = x["Remarks"].ToString();
_oResolutionList.Add(_oResolutionModel);
break;
}
_oResolutionList.Add(_oResolutionModel);
break;
}
In here my _oResolutionList count = 1, meaning there's two data in it and it duplicated the first data. I want to have only 1 data in my _oResolutionList. Do I need to add some code in my inner Foreach or should I change something on it.?
Or You can suggest me how to delete the second data entry.?
Instead of using a foreach loop. You can also check the nullity first and then assign.
You can also do :
_oResolutionFacade.setResolutionID(_oResolutionModel.activityNo);
DataTable res = _oResolutionFacade.getResolution(_oAppSetting.ConnectionString);
_oResolutionModel.solution = res.Rows[0]["Resolution"].ToString() ?? string.Empty; //To make sure that if it is null it will assign to an empty string
_oResolutionModel.remarks = res.Rows[0]["Remarks"].ToString()?? string.Empty;
You have many solutions to deal with that.
Hope it will help you
I am trying to create a multiple choice questionnaire that is table-driven. There is a Question that has child Choices within each question.
When I iterate the listOfQuestions, the first SQL is executed. I thought by "including" Choices that this would prevent a secondary lookup from occuring when I loop though the Choices for the current Question, but it did not.
Why?
var listOfQuestions = (from q in journeyEastContext.Questions.Include("Choices")
orderby q.QuestionId
select new
{
Question = q,
Choices = q.Choices.OrderBy(c => c.Sequence)
});
foreach (var questionGroup in listOfQuestions)
{
Question question = questionGroup.Question;
Literal paragraph = new Literal
{
Text = "<P/>"
};
this.QuestionPanel.Controls.Add(paragraph);
Label QuestionLabel = new Label
{
Text = question.Text
};
this.QuestionPanel.Controls.Add(QuestionLabel);
//var sortedChoices = from choices in question.Choices
// orderby choices.Sequence
// select choices;
foreach (Choice choice in question.Choices)
{
Literal carrageReturn = new Literal
{
Text = "<BR/>"
};
this.QuestionPanel.Controls.Add(carrageReturn);
RadioButton choiceRadioButton = new RadioButton()
{
ID = String.Format("{0},{1}", question.QuestionId, choice.ChoiceId),
Text = choice.Text,
GroupName = question.QuestionId.ToString()
};
this.QuestionPanel.Controls.Add(choiceRadioButton);
}
}
It is because of the projection being part of the query.
select new
{
Question = q,
Choices = q.Choices.OrderBy(c => c.Sequence)
});
There are a few ways to approach the solution to this, the simplest would be
var quesitonsList = (from q in journeyEastContext.Questions.Include("Choices")
orderby q.QuestionId).ToList();
var listOfQuestions = from q in questionsList
Select new
{
Question = q,
Choices = q.Choices.OrderBy(c => c.Sequence)
});
This would tell EF to execute the first query (with the Choices property eagerly loaded) and then let you run through your iteration without having extra queries fired off.
.Include and .Select do not mix because of the type of query being generated in T-SQL. Basically projections use inner select statements and eagerly loaded properties use denormalization and joins to flatten the record set.
var getAllProducts = _productService.GetAllProducts();
if (productstest.Count > 0)
{
model.idproduct.Add(new SelectListItem()
{
Value = "0",
Text = _localizationService.GetResource("Common.All")
});
foreach (var m in getAllProducts)
model.idproduct.Add(new SelectListItem()
{
Value = m.Id.ToString(),
**Text = m.Size.Distinct().ToString(),**
Selected = model.Pid == m.Id
});
}
public virtual IList<Product> GetAllProducts(bool showHidden = false)
{
var query = from p in _productRepository.Table
orderby p.Name
where (showHidden || p.Published) &&
!p.Deleted
select p;
var products = query.ToList();
return products;
}
The issue is even i tried to populate the select list with distinct size using: Text = m.Size.Distinct().ToString(), but it shows the duplicate for instance 100 products are of size 33 cm , the list will populate the dropdownlist in the view with 33cm occuring 100 times , I dont want to show 100 times , just want to show 1 time, Can any one assist me with this issue ?
Presumably you are only trying to show one product of each different size... if so initialising your getAllProducts variable like so will do the trick:
var getAllProducts = _productService.GetAllProducts().GroupBy(p => p.Size).Select(g => g.First());