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如何從已刪除的行中檢索信息。我已經從數據集中的表中刪除了一些行,然後使用方法GetChanges(DataRowState.Deleted)來獲取刪除的行。 我試着在服務器端的原始表中刪除行,但它完成了這些錯誤。如何從已刪除的行中檢索信息
System.Data.DeletedRowInaccessibleException:無法通過該行訪問已刪除的行信息。
什麼是正確的方法?這是我的代碼,有什麼建議嗎?謝謝大家
Dataset ds = //get dataset from client side
//get changes
DataTable delRows = ds.Tables[0].GetChanges(DataRowState.Deleted);
//try delete rows in table in DB
if (delRows != null)
{
string connStr = WebConfigurationManager.ConnectionStrings["Employees"].ConnectionString;
conn = new SqlConnection(connStr);
conn.Open();
for (int i = 0; i < delRows.Rows.Count; i++)
{
string cmdText = string.Format("DELETE Tab1 WHERE [email protected]");
cmd = new SqlCommand() { Connection = conn, CommandText = cmdText };
//here is problem, I need get surnames from rows which was deleted
var sqlParam = new SqlParameter(@"Surname", SqlDbType.VarChar) { Value = delRows.Rows[i][1].ToString() };
cmd.Parameters.Add(sqlParam);
cmd.CommandText = cmdText;
cmd.Connection = conn;
cmd.ExecuteNonQuery();
}
}