Question

我想更新表格中的列，我已经编写了运行良好的代码，没有任何错误，它也会显示确认对话框，但表格没有更新，但代码有问题。

    Dim sqlConn As New SqlClient.SqlConnection
    sqlConn.ConnectionString = "Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\housingsociety.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"

    Try
        sqlConn.Open()
    Catch sqlError As Exception
        MsgBox(sqlError.Message, 0, "Connection Error!")
    End Try

    Dim sqlComm As New SqlClient.SqlCommand
    sqlComm.Connection = sqlConn
    sqlComm.CommandText = "update committe_member set name = '@name' where name = 'member1'"


    Dim paramString As New SqlClient.SqlParameter("@name", SqlDbType.VarChar, 50)
    paramString.Direction = ParameterDirection.Input
    sqlComm.Parameters.Add(paramString)
    paramString.Value = TextBox1.Text

    sqlComm.ExecuteNonQuery()

    MsgBox("Record Sucessfully Altered", 0, "Confirmation!")

    sqlConn.Close()

Answer 1

您不需要在SQL字符串中引用该参数。

尝试以下方法：

sqlComm.CommandText = "update committe_member set name = @name where name = 'member1'"

我还要在将参数值添加到参数集合之前设置参数值：

paramString.Value = TextBox1.Text sqlComm.Parameters.Add(paramString)

在ado.net中更新查询

1 个答案: