1. 确保使用正确的日期格式。在Access中，日期格式为#MM/DD/YYYY#，在VB.NET中为"MM/dd/yyyy"。
2. 使用DateTimePicker控件来选择日期，这将确保选择的日期格式正确。
3. 将查询字符串中的日期格式转换为正确的格式，例如： Dim filter as String = "SELECT * FROM Table1 WHERE DateField = #" & DateTimePicker1.Value.ToString("MM/dd/yyyy") & "#"
4. 如果使用参数化查询，确保日期参数正确设置。例如： Dim cmd As New OleDbCommand("SELECT * FROM Table1 WHERE DateField = @date", conn) cmd.Parameters.AddWithValue("@date", DateTimePicker1.Value)
5. 考虑使用LINQ来过滤查询结果，如： Dim query = From row In Table1.AsEnumerable() Where row.Field(Of DateTime)("DateField") = DateTimePicker1.Value Select row。

代码示例：

'使用查询字符串时的示例 Dim filter as String = "SELECT * FROM Table1 WHERE DateField = #" & DateTimePicker1.Value.ToString("MM/dd/yyyy") & "#" Dim adapter As New OleDbDataAdapter(filter, conn) Dim ds As New DataSet() adapter.Fill(ds, "Table1") DataGridView1.DataSource = ds.Tables("Table1")

'使用参数化查询时的示例 Dim cmd As New OleDbCommand("SELECT * FROM Table1 WHERE DateField = @date", conn) cmd.Parameters.AddWithValue("@date", DateTimePicker1.Value) Dim adapter As New OleDbDataAdapter(cmd) Dim ds As New DataSet() adapter.Fill(ds, "Table1") DataGridView1.DataSource = ds.Tables("Table1")

'使用LINQ时的示例 Dim query = From row In Table1.AsEnumerable() Where row.Field(Of DateTime)("DateField") = DateTimePicker1.Value Select row DataGridView1.DataSource = query.ToList()