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vb.net做音頻播放器，如何消除對話框
有點復(fù)雜，如果是Excel，有Application.DisplayAlerts=False'這是Excel阻止警告
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我粗看了下MediaPlayer沒有提供類似的接口，試著用消息捕獲的方法看看
Protected?Overrides?Sub?WndProc(ByRef?m?As?System.Windows.Forms.Message)?'消息捕獲
If?m.Msg?=?H999?Then?'這里的值要你自己去測試出來（就是彈出對話框時的值)
SendKeys.Send("{ENTER}")?'發(fā)送回車鍵
End?If
MyBase.WndProc(m)
End?Sub
vb系統(tǒng)中警告窗體是如何實現(xiàn)的？
Private Sub Command1_Click()
MsgBox "黃色感嘆號 確定", vbExclamation, "系統(tǒng)提示"
End Sub
Private Sub Command2_Click()
MsgBox "綠色問號 確定！", vbQuestion, "系統(tǒng)提示"
End Sub
Private Sub Command3_Click()
MsgBox "綠色 i 確定", vbInformation, "系統(tǒng)提示"
End Sub
Private Sub Command4_Click()
MsgBox "終止 重試 忽略", vbAbortRetryIgnore, "系統(tǒng)提示"
End Sub
Private Sub Command5_Click()
MsgBox "是 否 取消", vbYesNoCancel, "系統(tǒng)提示"
End Sub
Private Sub Command6_Click()
MsgBox "確定", vbOKOnly, "系統(tǒng)提示"
End Sub
Private Sub Command7_Click()
MsgBox "大把 × 確定", vbCritical, "系統(tǒng)提示"
End Sub
Private Sub Command8_Click()
MsgBox "確定 取消", vbOKCancel, "系統(tǒng)提示"
End Sub
Private Sub Command9_Click()
MsgBox "確定 幫助", vbMsgBoxHelpButton, "系統(tǒng)提示"
End Sub
Private Sub Command10_Click()
MsgBox "重試 取消", vbRetryCancel, "系統(tǒng)提示"
End Sub
Private Sub Command11_Click()
MsgBox "是 否", vbYesNo, "系統(tǒng)提示"
End Sub
VB.NET中出現(xiàn)如圖所示的警告如何更正，幫忙解決下 謝謝
Private Function getAccessConnection() As OleDbConnection
'整體思路應(yīng)該是：連接數(shù)據(jù)庫－運用適配器運行查詢詞句-將查詢結(jié)果填充到數(shù)據(jù)集－以數(shù)據(jù)集為數(shù)據(jù)源，在DataGrid中顯示。
Dim dbConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;
Data Source=|DataDirectory|\Resources\mag.mdb;Persist Security Info=true"
'連接字符串，Provider,連接引擎，可以死記，OLEDB就用這處，Data Source,設(shè)置數(shù)據(jù)庫的位置。
Dim dbConnection As OleDbConnection = New OleDbConnection(dbConnectionString)
Try
dbConnection.Open()
Catch Ex As Exception
’MsgBox(Err.Description)
End Try
Return dbConnection
End Function
private Sub fillDataGridView()
Dim sqlStr As String = "select * from Table"
Dim DataAdapter As New OleDbDataAdapter
Dim dataSet As New DataSet
Dim DataGridView As New DataGridView
Dim dbConnection As OleDbConnection = getAccessConnection()
If dbConnection.State.ToString = "Closed" Then
MsgBox(Chr(13) " access 數(shù)據(jù)庫連接失敗 " Chr(13), , "警告")
Exit Sub
End If
DataAdapter.SelectCommand = New OleDbCommand(sqlStr,dbConnection)
'用數(shù)據(jù)適配器進行查詢
Try
DataAdapter.Fill(dataSet,"Table") '將查詢結(jié)果填充到數(shù)據(jù)集Dataset,有點像VB中的記錄集recordset
DataGridView.DataSource = dataSet.Tables("Table").DefaultView '將數(shù)據(jù)集的內(nèi)容在表格中顯示出來
Catch Ex As Exception
MsgBox(Err.Description)
Finally
dataSet.Dispose
DataAdapter.Dispose
dbConnection.Close
dbConnection.Dispose
End Try
End Sub
vb.net中textbox 只輸入字母,如果輸入其他則彈出提示框
Private Sub TextBox1_KeyPress1(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
If e.KeyChar = "A" And e.KeyChar = "Z" Or e.KeyChar = "a" And e.KeyChar = "z" Then
e.Handled = False
Else
MessageBox.Show ("只能輸入字母！")
e.Handled = True
Exit Sub
End If
End Sub
本文標(biāo)題：vb.net警告對話框 vb警告提示框
文章出自：http://fisionsoft.com.cn/article/dohgisp.html
