我试图从我在OleDBDataAdapter中找到的SQL查询字符串执行查询,以便我可以使用查询字符串的结果填充datagridview . 字符串是:
Dim sqlsearch as string = "select DateField1, DateField2 from TableOne where DateField1 >= '" & CType(StDate, Date) & "' and DateField1 <= '" & CType(EnDate, Date) & "'"
我想显示开始日期和结束日期之间的日期结果 . “StDate”是开始日期,“EnDate”是结束日期,它们从两个文本框中获取它们的值(两个文本框是只读的,并从使用短日期格式的DateTimePicker控件获取日期字符串) .
数据库字段“DateField1”和“DateField2”也使用相同的日期格式(Short) . 我用来尝试填充datagridview的代码如下:
Try
Dim StDate As String = TextBox1.Text
Dim EnDate As String = TextBox2.Text
Dim sqlsearch As String
Dim adapter As New OleDbDataAdapter
Dim dt As New DataTable("TableOne")
Try
DBConnas.ConnectionString = ConnStr
DBConnas.Open()
sqlsearch = "select DateField1, DateField2 from TableOne where DateField1 >= '" & CType(StDate, Date) & "' and DateField1 <= '" & CType(EnDate, Date) & "'"
' Once again we execute the SQL statements against our DataBase
adapter = New OleDbDataAdapter(sqlsearch, DBConnas)
' Shows the records and updates the DataGridView
dt = New DataTable("TableOne")
adapter.Fill(dt)
DataGridView1.DataSource = dt
DBConnas.Close()
Catch ex As Exception
MsgBox(ex.Message)
DBConnas.Close()
End Try
Catch ex As Exception
MsgBox(ex.Message)
End Try
当dt必须填充适配器时,我收到“条件表达式中的数据类型不匹配”异常消息 .
请帮助我[roblem或帮助我更好地查询vb.net和MS Access中的日期范围 .
2 回答
尝试使用octothorphes和强制格式: