C# 无法将对象转换为字符串

我已经用AES加密了MS Access文件中的每一项。加密非常有效。问题是我遇到了一个错误：

参数1:无法在以下行上从“object”转换为“string”

：security.Decrypt（readPersonalData.GetValue（1）、storedAuth.Password、storedAuth.UserName）

我怎样才能避免这种情况

        if (readPersonalData.HasRows)
        {
            while (readPersonalData.Read())
            {
                // Count all entries read from the reader.
                countEntries++;


                txtDisplay.Text += "=== Entry ID: " + readPersonalData.GetValue(0) + " ===" + Environment.NewLine;
                txtDisplay.Text += "Type: " + security.Decrypt(readPersonalData.GetValue(1), storedAuth.Password, storedAuth.UserName) + Environment.NewLine;
                if (!readPersonalData.IsDBNull(2)) txtDisplay.Text += "URL: " + security.Decrypt(readPersonalData.GetValue(2), storedAuth.Password, storedAuth.UserName) + Environment.NewLine;
                if (!readPersonalData.IsDBNull(3)) txtDisplay.Text += "Software Name: " + security.Decrypt(readPersonalData.GetValue(3), storedAuth.Password, storedAuth.UserName) + Environment.NewLine;
                if (!readPersonalData.IsDBNull(4)) txtDisplay.Text += "Serial Code: " + security.Decrypt(readPersonalData.GetValue(4), storedAuth.Password, storedAuth.UserName) + Environment.NewLine;
                if (!readPersonalData.IsDBNull(5)) txtDisplay.Text += "User Name: " + security.Decrypt(readPersonalData.GetValue(5), storedAuth.Password, storedAuth.UserName) + Environment.NewLine;
                if (!readPersonalData.IsDBNull(6)) txtDisplay.Text += "Password: " + security.Decrypt(readPersonalData.GetValue(6), storedAuth.Password, storedAuth.UserName) + Environment.NewLine;
                txtDisplay.Text += Environment.NewLine;
            }
        }

你可以试试-

txtDisplay.Text += "Type: " + security.Decrypt(readPersonalData.GetString(1), storedAuth.Password, storedAuth.UserName) + Environment.NewLine;

---

它应该返回一个字符串，该字符串可以传递给

security.Decrypt

函数。

如果在GetValue（1）之后添加一个ToString（）怎么办？不起作用。“我已经试过了。”NewHelpNeeder，除了接受答案外，你最好把答案投上去，以表示它是有用的。