你好64109655，
可以考虑把DataGridView指定列Value取出拼接成SQL作为“In”的过滤条件：
Dim searchString As String = "("
For Each (row As DataGridViewRow In xxxGrid1.Rows)
{
searchString &= "'" & row(CellIndex).Value.ToString() & "',"
}
searchString = searchString.Remove(searchString.Length-1) '移除最后一个英文逗号
searchString &= ")"
'Then you can use Select * From t Where [Code] In
+ 'searchString to query out the data contents you want with 'the help of SqlDataAdapter
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