Vb.net 从文本框中指定数据库路径
我想创建一个新的MS Access数据库,方法是从文本框中指定路径,而不是在vb中运行时预先编写的路径。网 进口阿多克斯 公开课表格1Vb.net 从文本框中指定数据库路径,vb.net,ms-access,ado.net,Vb.net,Ms Access,Ado.net,我想创建一个新的MS Access数据库,方法是从文本框中指定路径,而不是在vb中运行时预先编写的路径。网 进口阿多克斯 公开课表格1 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Try Dim cat As Catalog = New Catalog() cat.Create("Provider=Microsoft.Jet.O
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Try
Dim cat As Catalog = New Catalog()
cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=C:\Users\Anish Choudhary\Desktop\New folder\N.mdb;" & _
"Jet OLEDB:Engine Type=5")
MessageBox.Show("Database Created Successfully")
cat = Nothing
Catch ex As Exception
MessageBox.Show("Database already Exists")
End Try
End Sub
End Class您只需参考代码中的文本框即可 假设您的代码在带有文本框的表单中
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Try
Dim cat As Catalog = New Catalog()
cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=" & txtFilePath & "N.mdb;" & _
"Jet OLEDB:Engine Type=5")
MessageBox.Show("Database Created Successfully")
cat = Nothing
Catch ex As Exception
MessageBox.Show("Database already Exists")
End Try
End Sub
使用网络库提供的适当控件,而不是使用文本框获取文件夹路径。它被称为 文本框不适合这种操作。用户在键入正确的路径时可能会遇到很多问题,而FolderBrowserDialog由于其简单性,无需手动键入任何内容即可到达正确的路径
Dim fbd = New FolderBrowserDialog()
fbd.Description = "Select a folder for the new database"
fbd.RootFolder = Environment.SpecialFolder.MyComputer
fbd.ShowNewFolderButton = True
If fbd.ShowDialog() = DialogResult.OK Then
Try
Dim filePath = Path.Combine(fbd.SelectedPath, "N.mdb")
Dim cat As Catalog = New Catalog()
cat.Create("Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=" & filePath & _
"Jet OLEDB:Engine Type=5")
MessageBox.Show("Database Created Successfully")
cat = Nothing
Catch ex As Exception
MessageBox.Show("Database already Exists")
End Try
End If
我应该说这些方法都不起作用。在第一种情况下,您不允许更改添加自己参数的标准事件处理程序的签名,在第二种情况下,如果txtFilePath是文本框,则应使用txtFilePath.Text属性(如果用户忘记键入最后的反斜杠,mdb文件的连接可能会失败)当iam将Textbox作为参数传递时,方法1不起作用,但方法2已完成。您的代码在try块的第一行给出错误,即“'path'未声明。由于其保护级别,它可能处于可访问状态。”Path类在System.IO命名空间中定义,然后需要在包含以下代码的文件中添加此行:Imports System.IO