条件表达式中的数据类型不匹配（Access DB）

Question

我在数据库 Table 中的数据类型是短文本，我不确定为什么我在 command2.ExecuteNonQuery();

收到此错误

错误信息

An unhandled exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll

Additional information: Data type mismatch in criteria expression.

我的代码

OleDbCommand cmd1 = new OleDbCommand();
cmd1.Connection = con;
cmd1.CommandText = "SELECT * FROM Customers Where FirstName=@FirstName OR LastName=@FirstName OR NRIC=@FirstName";
cmd1.Parameters.AddWithValue("@FirstName", txtSearch.Text);
OleDbDataReader read2 = cmd1.ExecuteReader();
string id = "";
while(read2.Read())
{
    id = read2["id"].ToString();
}
OleDbCommand command2 = new OleDbCommand();
command2.CommandText = "UPDATE CheckIn_Details SET ModeOfCheckIn='True' WHERE ID='" + id + "'";
command2.Connection = con;
command2.ExecuteNonQuery();

Answer 1

如果 ID 是自动编号，则不需要引号。试试这个：

command2.CommandText = "UPDATE CheckIn_Details SET ModeOfCheckIn='True' 
WHERE ID=" + id;

条件表达式中的数据类型不匹配（Access DB）

Data type mismatch in criteria expression (Access DB)

c#

oledb

sql-update