vb.net警告對話框 vb警告提示框

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(yùn)用適配器運(yùn)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(jìn)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

當(dāng)前標(biāo)題：vb.net警告對話框 vb警告提示框
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