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dim s() as string
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For Each fm1 In Panel1.Controls
dim i=0
if fm1.GetType.ToString = "System.Windows.Forms.TextBox" Then
s(i)=fm1.text
i+=1
End If
Next
ALTER TABLE TABLE_Name ADD columnName varchar(30) '新增字段
ALTER TABLE TABLE_Name ADD columnName1 varchar(30) '新增字段
INSERT INTO TABLE_Name(columnName,columnName1)VALUES(columnName,columnName1) ‘插入新行,只给新字段赋值
在窗体上添加一个Chart1控件和一个Button1控件:
完整代码如下:(复制就可以用)
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Chart1.Series.RemoveAt(0) '清除原来的系列
Dim i As Integer
Dim j As Integer
For i = 0 To 11 '设置有12个系列
Chart1.Series.Add("系列" i + 1)
''添加数据点的个数
For j = 0 To 3 '设置有4个数据点
Chart1.Series(i).Points.Add()
Next
Next
'用生成的随机数(范围[2.0,9.9]),作为数据
Randomize()
For i = 0 To 11
For j = 0 To 3
Chart1.Series(i).Points(j).YValues = {Int((99 - 20 + 1) * Rnd() + 20) / 10} '将随机数据赋值给图表点的Y值
Next
Chart1.Series(i).ChartType = DataVisualization.Charting.SeriesChartType.Column '设置图表类型
Next
End Sub
End Class
添加项: ComboBox1.Items.Add("123")
直接赋值: ComboBox1.Text = "123"
======================
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
For i = 1 To 10
ComboBox1.Items.Add("添加项:" i)
ComboBox2.Items.Add("添加项:" i)
Next
End Sub
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
ComboBox2.SelectedIndex = ComboBox1.SelectedIndex
End Sub
DataTable dt = new DataTable();
int col = dt.Columns.Count;
string[,] array = new string[dt.Rows.Count,col];
for (int i = 0; i dt.Rows.Count; i++)
{
for (int j = 0; j dt.Columns.Count; j++)
{
array[i, j] = dt.Rows[i][j].ToString().ToUpper().Trim();
}
}
Dim
dr
As
DataRow()
=
ds.Tables(0).Select("ID='"
IDText.Text
"'")
'这里要不要加单引号看你数据库的类型
NameText1.Text
=
dr(0)("Name1")
NameText2.Text
=
dr(0)("Name2")
记得采纳啊