如何使用datagridview coloum减去文本框值 [英] How to Subtract textbox value with datagridview coloum..

问题描述

Hy大家

我的vb项目需要帮助

最后一天我创建了股票数据库

数据库有2个coloums第1个项目名称第2个数量

在我的表格中我有两个文本框与数据库和一个按钮相同

按下按钮时

如果我的Itemname文本框与数据库coloum {itemname}匹配，则Quantity Textbox减去Quantitycoloum

如果与数据库itemname coloum相匹配[2] coloum2数量减去Quantitytextbox

这里我的代码工作但是很冗长： -

Hy everyone
I need help for my vb project
last day i created stock database
the database have 2 coloums 1st"Item Name" 2nd "Quantity"
In my form i Have two textboxes same as database and a button
when button press
if my "Itemname textbox" match with database coloum{itemname} then "Quantity Textbox" subtract with "Quantitycoloum"
if match with database "itemname coloum"[2] the coloum2 quantity subtract with "Quantitytextbox"
here My Code its work but So Lengthy:-

If itemname.Text = Me.DataGridView1.Rows(0).Cells(0).Value Then
            Me.DataGridView1.Rows(0).Cells(1).Value = CDbl(Me.DataGridView1.Rows(0).Cells(1).Value) - CDbl(quantity.Text)
            MsgBox("Data Saved SuccessFully")
            quantity.Text = ""
            itemname.Text = ""

        ElseIf itemname.text = Me.DataGridView1.Rows(1).Cells(0).Value Then
            Me.DataGridView1.Rows(1).Cells(1).Value = CDbl(quantity.Text) - CDbl(Me.DataGridView1.Rows(1).Cells(1).Value)
            MsgBox("Data Saved SuccessFully")
            quantity = ""
            itemname.Text = ""

        ElseIf itemname.Text = Me.DataGridView1.Rows(2).Cells(0).Value Then
            Me.DataGridView1.Rows(2).Cells(1).Value = CDbl(quantity.Text) - CDbl(Me.DataGridView1.Rows(2).Cells(1).Value)
            MsgBox("Data Saved SuccessFully")
            quantity = ""
            itemname.Text = ""


        ElseIf itemname.Text = Me.DataGridView1.Rows(3).Cells(0).Value Then
            Me.DataGridView1.Rows(3).Cells(1).Value = CDbl(quantity.Text) - CDbl(Me.DataGridView1.Rows(3).Cells(1).Value)
            MsgBox("Data Saved SuccessFully")
            quantity.Text = ""
            itemname.Text = ""

          endif
end sub
And So on.......
PLEASE HELP ....

推荐答案

For Each row As DataRow In Me.DataGridView1.Rows
	If itemname.Text = row.Cells(0).Value Then
		row.Cells(1).Value = Convert.ToDouble(row.Cells(1).Value) - Convert.ToDouble(quantity.Text)
		Interaction.MsgBox("Data Saved SuccessFully")
		quantity.Text = ""
		itemname.Text = ""
		Exit For
	End If
Next

读 For Each ... Next Statement（Visual Basic） [ ^ ]

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