vb.net求總和,vb中求和

VB.net中的求和問題

Private Sub Command1_Click()

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MsgBox CalcResult(2)

End Sub

Public Function CalcResult(X As Long) As Double

Dim dblMinLevel As Double

Dim dblItem As Double

Dim dblN As Double

Dim dblMember As Double, dblBase As Double

Dim i As Double

Dim dblResult As Double

dblMinLevel = 10 ^ (-6)

dblN = 0

dblMember = X ^ dblN

dblBase = 1

i = dblN

Do While i 1

dblBase = dblBase * i

i = i - 1

Loop

dblItem = dblMember / dblBase

dblResult = dblResult + dblItem

dblN = dblN + 1

Loop While dblItem = dblMinLevel

CalcResult = dblResult

End Function

VB.NET 中datagrid一列怎么求和

Dim textColumn As New DataGridViewTextBoxColumn() '定義一個新的textbox格式的列

textColumn.Name = "Column1" '定義該列的Name

textColumn.HeaderText = "Column1" '定義該列的標(biāo)題

DataGridView1.Columns.Add(textColumn)

For Each r As DataGridViewRow In DataGridView1.Rows '循環(huán)DataGridView的行

r.Cells(textColumn.Index).Value = r.Cells(0).Value + r.Cells(1).Value '將第一列和第二列單元格數(shù)據(jù)相加，并顯示在新添加的單元格上

VB.NET條件查詢ACCESS并求和怎么寫代碼？

因為你要計算和，所以在查詢的時候把排序的查詢參數(shù)去掉了

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load

Dim conn As New OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=F:\project\office\test.accdb")

Dim cmd As New OleDb.OleDbCommand("select sum(金額) as m from shop where 時間='15-12-1' And 名字 = '張三' ", conn)

Dim adp As New OleDb.OleDbDataAdapter(cmd)

conn.Open()

Dim tb As New DataTable

adp.Fill(tb)

TextBox1.Text = tb.Rows(0).Item(0).ToString()

End Sub

VB.net中 datagridview控件如何讀取框選區(qū)域內(nèi)的行數(shù)和區(qū)域內(nèi)的數(shù)據(jù)總和

在窗體上加上三個標(biāo)簽控件：Label1、Label2、Label3

Private?Sub?DataGridView1_MouseUp(ByVal?sender?As?Object,?ByVal?e?As?System.Windows.Forms.MouseEventArgs)?Handles?DataGridView1.MouseUp

Dim?counter?As?Integer

Dim?SelectedCellTotal?As?Integer?=?0

Dim?SelectedCellCount?As?Integer?=?0

For?counter?=?0?To?(DataGridView1.SelectedCells.Count?-?1)

If?DataGridView1.SelectedCells(counter).FormattedValueType?Is?_

Type.GetType("System.String")?Then

Dim?value?As?String?=?Nothing

If?(DataGridView1.IsCurrentCellDirty?=?True)?Then

value?=?DataGridView1.SelectedCells(counter).EditedFormattedValue.ToString()

Else

value?=?DataGridView1.SelectedCells(counter).FormattedValue.ToString()

End?If

If?value?IsNot?Nothing?Then

If?Not?value.Length?=?0?Then

SelectedCellTotal?=?SelectedCellTotal?+?Integer.Parse(value)

SelectedCellCount?=?SelectedCellCount?+?1

End?If

Label1.Text?=?"選中的單元格個數(shù)為:?"??SelectedCellCount.ToString()

Label2.Text?=?"單元格里數(shù)據(jù)之和為:?"??SelectedCellTotal.ToString()

Label3.Text?=?"選中的單元格行數(shù)為："??DataGridView1.SelectedRows.Count.ToString()

End?Sub

vb net data grid view如何計算這一列的總和

用循環(huán)啊

Private?Sub?Button1_Click(ByVal?sender?As?System.Object,?ByVal?e?As?System.EventArgs)?Handles?Button1.Click

Dim?count?As?Integer?=?Me.DataGridView1.Rows.Count

Dim?sum?As?Double?=?0

For?i?=?0?To?count?-?1

sum?+=?Val(Me.DataGridView1.Item("Amount",?i).Value)

MsgBox("和是:"??sum)

End?Sub

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