DataGrid Columns Math - Result Return The Answer In The Unbound Yield Column For That Row Represented As A Percentage?
Sep 20, 2010
I have a table in a data grid the columns are bound to the columns...
SQFT QTY WIDTH LENGTH
i also have added into the datagrid an unbound column called Yeild%.what i'm trying to do is the following formula
SQFT / (QTY * (width * length / 144) and have the result return the answer in the unbound yield column for that row represented as a percentage
So if SQFT = 178 QTY = 2 Width = 144 Length = 102 answer would be 0.87 (rounded)
so this would be 87%
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Sep 29, 2009
Will Visual Basic in Visual Studio 2010 have the YIELD keyword?If not.... Why?
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Feb 18, 2012
How can I get the precentage return from the each rows column A and column B then display in each rows column C? I have done the code below but seem
For Each itm As ListViewItem In ListView1.Items
itm.SubItems(5).Text = ((itm.SubItems(4).Text) / (itm.SubItems(1).Text) * 100)
Next
[code].....
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How to add unbound check box column to databound DataGrid (WinForms .NET 1.0, 1.1)?
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Feb 2, 2011
I'm converting some C# code and I'm stuck at this line:c# while (iterator.MoveNext()) yield return iterator.Current;
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Feb 1, 2011
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Jan 17, 2012
I am using a Strongly Typed Dataset as DAL. I want to return a single column from my table for that i wrote the code as
SELECT DISTINCT Floor
FROM Room
WHERE (Building = @Building)
But when i previewed the data, it shows me all the columns of the table with Null Value and the column with primary key has -1 value. This condition raise an Exception when i link this query to a ComboBox ..
cmbFloor.DataSource = da.GetFloorByBuilding(cmbBuilding.Text)
cmbFloor.DisplayMember = "Floor"
Error: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
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May 17, 2009
In C#, when writing a function that returns an IEnumerble<>, you can use yield return to return a single item of the enumeration and yield break; to signify no remaining items. What is the VB.NET syntax for doing the same thing?
[Code]...
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Feb 19, 2010
Private Sub uiSCORE_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles uiSCORE.Click
'Displays Correct or Wrong in Labels
If ui1Textbox.Text.ToUpper = "FOOD" Then[code]....
I finally finished all my labels and textbox codes for this button.But now I have to code it so that I will be able to click the button and it will calculate all the wrong and correct answers in the labels and then finally place the percentage score in the uiScorePercentagelabel. What I dont understand is how to calculate all the different labels as one and then show the percentage right in the appropriate label.
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I'm trying to take a result for a simple website conversion calculator and turn that into a percentage. So for example, if the result is 0.314500 I want to turn that into 31.4%.Here is the code I have so far for this:
Visual Basic 2008
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim d As Decimal
d = (TextBox2.Text.ToString / TextBox1.Text.ToString)
Me.TextBox3.Text = Decimal.Round(d, 4).ToString("f6")
End Sub
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Jun 30, 2010
I have an application that converts one database to another and one of the functions I use is insert_Note below. This application has multipule threads all inserting diffrent data into the new database. The code below works for a number of inserts ranging between 24 and 120 but then fails with the error:There are fewer columns in the INSERT statement than values specified in the VALUES clause. The number of values in the VALUES clause must match the number of columns specified in the INSERT statement.I you look at the code you will see that this cannot be the problem as the code works for some inserts but not all. What else can cause this error in a multithread applicationuld be welcome as I have spent three days on this and got no where!
*Public sub insert_Note
Dim sql As String
Dim cmd As New SqlClient.SqlCommand
[code].....
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Nov 23, 2011
I have a datagridview.. It is unbound to any database and has 2 columns..1 is item name and other is amount/expense, incurred..I want the total of expense incurred be displayed in the textbox on button click ie adding the numbers in amount column..
[Code]...
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May 14, 2010
Dim Comp = From C In db.Table1 _
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Datagridview1.DataSource = Comp
Am using the Entity Framework and Columns Completed and Taken are of bit Datatype. When the query results are displayed in the datagridview, these bit columns are returned as of ColumnType Textbox - so i get a Datagridview textbox column with true or false string values.
I want to display Completed and Taken as Checkbox columns (either ticked for True or un-ticked for false) but ofcourse i can't do this in EditColumn dialogue because the Datagridview is unbound.
how can i change this in code at runtime
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Aug 12, 2011
I am adding two unbound calculated columns to datagridview. The columns show up but does not have the calculated data.
Private Sub Top10ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
Handles Top10ToolStripMenuItem.Click
[Code]......
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Dec 13, 2010
I have a datagridview that has 1 combobox column (it will eventually have between 1 and 3 more) but I can't find anything anywhere on how to add rows to this column. I create the columns:
[Code]...
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I have an unbound datagridview with a whole bunch of columns.I need to sort based on 4 columns, the first three are simple strings, the fouth is a date string (which in itself presents a problem, since it wants to sort lexically but I need them in date order).
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I am working with an Unbound DataGridView. I would like to vary the contents of a second combobox based on what is selected in the first. I have code to add the columns and populate the first combobox, but I can't figure out how to do the second one since it can (and usually will) have a different list for each row AND the list must change when the selection in the first is changed.
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Sep 25, 2010
I am using a datagrid in my where i am having four columns. In first column the parameter values are entered and in the second column measured value is entered and in third column the nominal value is entered.Inthe fourth column the result is displayed by subtracting the measured value and nominal values. I am doing this calculation in Datagrid cell validated event. What i want is,there will be many rows in the grid,when typing the value in the third column the corresponding result will be displayedin the rowof theresult column,save button will be displayed while the form loads,when the calculate part is completed that is there should not any cell of the resut column empty then i should enable the save butto.
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Feb 6, 2011
Im getting mathematical errors. the part that I'm having problems with is, first, it doesn't add the tax to total the correct way. It adds it correctly if I put a dollar(1.00) but when I type one hundred dollars (100.00) it doesn't add the tax correctly. I am trying to compute and display the tax on the new subtotal. Second, it is not adding the correct change to the label in dollars, quarters, dimes, nickels, and cents. Third my arithmatic is not adding correctly when it has to do with the change due back. . Finally, forth I am also trying to do the following:
* add the total for this item to the order sub total and display the new subtotal.
* I have 2 clear buttons, one clears item, the other clears order the clear order button shoule clear out the change due and bordered label and have the subtotal reset to $0.00. The clear item should just clear out the quantity, unit price, and item total textbox.
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* the change due should be displayed in currency format in the readonly label, and should be displayed in terms of the number of dollars and coins due in the bordered label. [code]
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May 4, 2011
DataGridView1 is bound to a sql table. Cells(0) and (1) come from that table. Cells(2) and (3) are calculated. While debugging the code, the calculations and lookup look fine, but the results will not display in the columns. Here is the code:
Dim SeatsUsed As Integer = 0
For Each r As DataGridViewRow In DataGridView1.Rows
Try
[code]....
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I have common sub to save data from data table to database like this ad.Update(tb) It works fine, but problem comes when i populate Datagridview using a joined query which takes values from more than six tables, for example
[Code]...
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I'm writing an Windows Form Application and need to add an unbound checkbox to a datagrid.The datagrid displays the fields of an Access 2007 table and I need the checkbox to give the user the option to select/deselect any of the records shown in the datagrid. After the user clicks on a button, the application must read the whole datagrid to detect what records were chosen by the user and process each one accordingly.I tried using TableStyles but as this new column is not part of the database, it won't work.
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May 16, 2008
I'm using an unbound datagrid to make a balance sheet and I need to have a certain row sum the previous rows but it only concatenates (obviously the cells default as strings but I don't know how to fix it). I've really only worked on VBA and this is my first crack at .net Here's what I've tried that is wrong:
[Code]...
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Dec 13, 2010
I'm working on a quadratic formula program and when I enter 1 as A, 2 as B, and 1 as A (X should end up being -1), it returns "NaN" in both text boxes.
Here's the code:
CODE:
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Oct 20, 2009
x = 4.2 - 0.1
vb.net gives 4.1000000000000005
python gives 4.1000000000000005
Excel gives 4.1
Google calc gives 4.1
What is the reason this happens?
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I am trying to figure out a calculation I can perform in C# to determine the rows per column. Let's say I know I am going to have 3 columns and my record count is 46. I know that I can mod the results to get a remainder, but I would like something more efficient than what I have tried. So I know I will have 16 rows per column with a remainder of 14 for the last column, but what is the best way to loop through the resutls and keep counts.
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I have an unbound datagridview that I populate with data. When the user clicks on the column head the datagridview is sorted - which is fine for alphabetic fields but I have a column that contains numeric fields and goes from -100 to +100. This is sorted incorrectly by the number (all the 1s first then all the 2s and so on, ignoring the minus sign). How do I get it to sort my column numerically?
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Apr 5, 2010
Let's say that I have a DataGridView(myDGV) which I populate as follows:
'...
Dim strSQL as String = "SELECT col1,col2,col3 FROM myTable"
'....
myda.Fill(myDtb)
myDGV.DataSource = myDtb.
'The above code fills the DGV with data from the underlying query
'of the DataTable.
'Supposing that I want to add an unbound Column to the end of the DGV which appears together with the data returned by the query, is it possibe?
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Apr 4, 2011
Dim Application = From AL In db.AnnualLeave _
Where AL.Approval <> True _
Select LeaveID, EmpID, Name
[code]....
after calling `GridView3.DataBind(), why do i still get Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index.at this line of code GridView3.Columns(1).Visible = False yet the grid has rows and more than 2 columns. Note that the Gridview columns have NOT been defined at design time.
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