I have a Dataset with a Bunch of Columns used in a Report (DevExpress XtraReports) (DataSet being the DataSource). The Dataset has many columns, and i need to read a column (based on the row type), and decide which column value to read for the row, and apply formatting based on the row type.
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Is there a suggested way to handle this in the Report or at DataSet Level (excepting the formatting part)?
Question is the title itself. I was asked to use computed columns in SQL Server. But when I searched about it in Google, I found it was mainly for displaying the combined values of more than one coloumn. And usage of this may reduce performance if it is treated as a permanent coloumn. So I like to know
Advantages and disadvantages When and where we need to implement this. how can I achieve a solution for the below problem, if possible (with Compute columns. If not possible why?). Or any other way to implement this requirement. My requirement is to use a colomn which will identify which coloumn of that table was updated.So I can compare the values and identify the changes.
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OK, folks, help me figure out what I'm doing wrong. I have the following
Dim table1 As New DataTable("Table1")
table1.Columns.Add("column1", GetType(Integer))
table1.Columns.Add("column2", GetType(String))
table1.Columns.Add("column3", GetType(String))
table1.Columns.Add("column4", GetType(Integer))
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table1.Columns.Add("column7", GetType(String), "parent(Relation1).column6")On the last line where I try to add column7 I get an error saying "unable to find parent relation 'Relation1'". I thought I just added that relation?
i got two columns in mysql 2005 Grade and Remarks i need to do is.. when i input integers in grade column 1,1.25,1.50,1.75,2,2.25,2.50,2.75,3 then Remarks will show PASSED and when Grade is 4 up remarks will show FAILED(OPTIONAL)if Grade is null then Remarks will show UNKOWN this is my code but it doesnt works on sql computed column formula IIF(Grade >=4, 'Failed', IIF(Grade IN (1,1.25,1.50,1.75,2,2.25,2.50,2.75,3), 'PASSED','UNKNOWN'))
View 1 RepliesI'm have trouble summing a datagridview computed column. I can sum other columns in the DGV. Is it possible to sum a DGV computed column and have the result shown in a textbox elsewhere on the form? I have BindingSource with an End Date Column and a DaysLate computed by column. The calculation is in code and works fine. I now need a total days Late TextBox under the DGV days late column
View 2 Repliesi need the max ,min, avarage, for the 24 lines that lines counted from the line that contain the max date so i get the code for the max date for in the txt file this code used for both if txt file sorted by Ascending or by Descending
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
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I'm trying to add a computed column to a datatable that references another column in the datatable. Sometimes the computed column has a mathematical operation applied to it, but in this case I'm just referencing the original column. The code looks like the following:
ReportData.Columns.Add("1_1_US", _
GetType(Single), _
"1_1")
The code isn't actually hard coded as shown above - there are functions that return the values for the first and third parameters - but I checked those and they are returning the expected values and not generating any errors themselves.
The error is thrown when the .Add method is called, and the error states "Syntax error: Missing operand after '_1' operator." It seems to me that it doesn't like the column name, which I suppose I could change and just workaround it at the presentation level. Still, I'm curious. Is this a bug in the .net framework or something? It doesn't mind "1_1" as a column name in the datatable, so why is it having a problem with it in the expression statement?
I am creating a project in VB.NET in which one of the reports require that the name of employees should be displayed as column names and whatever work they have done for a stated period should appear in rows below that particular column.Now as it is clear, the columns will have to be added at runtime. Am using an ODBC Data source to populate the grid. Also since a loop will have to be done to find out the work done by employees individually, so the number of rows under one column might be less or more than the rows in the next column.Is there a way to create an empty data table and then update its contents based on columns and not add data based on addition of new rows.
View 1 Repliestable named mytablei have columns like this
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i would like is to include amount1 and amount 2 values into sum only if amount1paidstatus="yes" for amount1 and amount2paidstatus="yes" for amount2, something like for selected day and selected customer.query "should" look something like this:select amount1(if amount1paidstatus=1)+amount2(if amount2paidstatus="yes")from my tablewhere (day=1) and (customer=1)
I'm writing a help application for the Customer support team at my company to help agents ask better questions when customers report problems. In it, I've got a SQL database that contains all the products, topics, and questions. The layout is similar to the following:
Products Table:
Product_ID Product Name:
Topics Table:
Topic_ID Product_ID Topic
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I don't know if I'm making myself clear, but I basically need to do the equivalent to the following SQL statement: "SELECT PRODUCT_ID FROM Products WHERE PRODUCT_Name = LstProducts.SelectedValue"
I have a data gridview on my windows form with 4 columns. Now I identify a column as followed:
Dim item1 as String = DataGridView1.Item(1, index).Value
So now I use a number ( In this case: 1 ) for the column index, but I want to make it a bit more readable so now I want to obtain the column index based on the datagridview column name.[code]...
I am trying to implement a DataViewGrid in VB.NET that will be simply for identifying and selecting GIS features that are already within a database. Simple enough with DataGrids and DataSets, although there is one slight twist.First, I need to be able to populate the grid based on one record of the column [Name] that is chosen from a ComboBox(I have been able to populate the ComboBox, but not the grid).Second, I need to restructure the DataGridView so that each current column name is in a column called "Field" and the row for that one record chosen is in another column called "Value".As you can see here, each "Field" is a column name and each "Value" is one record for each of those columns. So, if I could somehow parse through all of the column names into a "Field" column, and also populate a "Value" column with one record for each [Name], I would be on the road to happiness.
View 1 RepliesWhat i am trying to achieve is that there are 7 columns in my db table. one is primary key and rest 6 are integer columns. Now my application will allow user to input 6 values. I want to compare 6 values entered by user to those 6 integer columns and if in any row 3 or more columns match user's input Primary key of that table is returned..I have tried using queries, cursor, nested loops and i am still unable to achieve my results..
UPDATED :DB Table Structure.. I am inputting 2,3,7,11,45,65. Number of returned rows should be 5. eg..
UID A1 A2 A3 A4 A5 A6
-----------------------
1 2 3 4 5 6 7
2 2 3 4 55 56 57
3 65 11 45 66 67 68
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IDs returned should be 1,3,4,9,10
I have a monthly forecast showing expense accounts by cost centre so columns headings look like:
Cost Centre, Account Number, Jan, Feb, Mar etc
Using VBA code to automate the process, I need to calculate the total for each month of each account number where the 2 left characters of the cost centre are the same. I have a formula which will calculate this (for one cost centre grouping/account) which looks like this:
=SUMPRODUCT((LEFT('Sheet2'!A6:A5136,2)="BE")*('Sheet2'!C6:C5136=AccountNumber)*('Sheet2'!D6:D5136))
I am not sure whether there is a more efficient way than using a formula like that (at the moment this would be used for 12 months on about 6 cost centre groupings with about 500 accounts each - though this would vary). Its not massive, but could be slow to calculate. I don't think the subtotals command is powerful enough, and I haven't used arrays for a long time (especially for what would appear to need a dynamic, mulch-dimensional array).
What is wrong with this, it throws a debug error.[code]...
View 3 RepliesI want to change the row color of every row in my DataGridView where a particular column value = "RBF3". I am currently using the DataBindingComplete event which seems to work fine, but it fires every time I change a cells value. I'd like for this bit of code to only fire when the datagridview is first displayed, sorted, or filtered. Is this possible?
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I fought through a good amount of this and have gotten to the point where I can sort my arrays. What I need to do now is take the following code and sort the elements in descending order instead of ascending order. I don't know how to do that with the two arguments in the code:
Dim Cols(3) As Int16
Cols(0) = ColumnNumber + 1
Cols(1) = ColumnNumber + 2
Cols(2) = ColumnNumber + 3
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Am trying to retrieve data from sql server based on two columns. Its a web application being developed using VS2010 (vb.net) but i keep getting the error: incorrect syntax near '='
Here's my code below:
Sub GetBasicMidwives()
' Set the SelectCommand properties...
With objDataAdapter
.SelectCommand = New SqlCommand()
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The user picks x amount of scenarios from the combobox, and x amount of columns appear in the datagridview. If the user changes the number of columns from x amount to y amount, the columns should be added/removed respectively but currently when y amount is chosen x amount of columns are in the datagridview.
I'm not sure how to do this, I've tried using an IF statement under the .SelectedIndexChanged event but the code adds columns until it reaches as high as it can go, then pulls an error saying too many columns.
I am trying to figure the best way to programmatically re-size table column headers in ReportViewer.Basically, my current resolution is the following: ColumnWidth = Header Caption_CharacterCount * 0.32...Where 0.32 is an estimated width of a typical character using my current font size.The issue is that the width leaves a lot of whitespace for longer captions.The more characters a caption has, the more whitespace I end up with.The issue with estimating this way is that not all characters are the same width. A good example would the the "I" character, which takes up less screen width than the rest of the alphabet.[code]
View 1 RepliesI have a DataGridView that has been dragged over from the DataSource Tab. All works good.I need to have the background color of some of the cells changed based on other columns in that same row. Such as, have the background color of a cell Red if the Status column (not shown) relates to 90 days overdue. The next row may be different.
View 6 RepliesI want to make a certain column of my datagridview red based on values from 2 other columns. I have a "HI" column, a "LOW" column and a "Result" Column which are all strings. Now I want to make the result column red if it's values is less than the "LOW" columns value or if it's value is greater than the "HI" columns value. I tried the following code but something is wrong because cells that shouldn't be red are red:
Private Sub dgvTests_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles dgvTests.CellFormatting
If dgvTests.Columns(e.ColumnIndex).Name.Equals("Result") Then
Dim RowValue As DataRow = TestTable.Rows(dgvTests.CurrentRow.Index)
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I need to duplicate records with duplicate records, but only if the first three columns out of 5 columns are duplicates. I am using MS ACCESS with VB.NET. How do I loop through the records and delete records with three duplicate columns
View 1 RepliesQ:how can i add columns dynamically to rdlc report from dataset in windows based.
View 1 RepliesI use Visual Studio 2010 and SQL Server 2008 R2. I have created an Entity Model in a class library which I have referenced in a VB Winforms project. I created a data source in the project based on the entity model in the dll. However, all columns in the data source are listed in alphabetical order instead of the native order from the SQL Server database. I cannot locate the cause of this as much as I try.
This might not seem a huge problem, but it is costing me valuable time in rearranging controls dragged to forms and reindexing their tabstop indexes.
I have been working on a web based report from an existing client/server apps mssql database. I have a working query, that pulls this information together from many tables, and can provide the query and a result set if necessary.
The results currently are similar to this.
ID | Name1 | Date1 | Veh | PO | Stops
_________________________________________
1 | Bob 1 | 12/1 | Car | 1234 | 4
2 | Sam | 12/3 | Car2 | 2245 | 3
2 | Joe | 12/4 | Van1 | 5568 | 2
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i am getting a syntax error at drr(5) which 5 is the column i want to base the color change on. this method works when i am using a dataset
Dim Land As String = "Land"
Dim Air As String = "Air"
Dim Cruise As String = "Cruise"
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how I can get the value of the ninth column. Columns are separated by spaces.
The value im getting will be added to a int so say int = 2 then the column is 32 then the int will be 34
am trying to calculate the values in rows in column 6 based on values of column 5. Bellow is the the code I am using I get a run time error about the string not formatted properly
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I need to display a column called Full Name in the my datagridview, but the datasource (datatable) does not have a FullName column. It only has FirstName and LastName columns. I'm setting up my DataGridView like this:
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