"The parameterized query expects a parameter which was not supplied"错误

Question

我正在研究代码以实现应用程序。错误显示

参数化查询' @Original_controllerip nvchar(19(，@isnull_controllername int'期望参数@isnull_controllername，未提供的参数。

我尝试添加Original_ControllerIPName和所有其他参数，但不起作用。

public virtual int Delete(string Original_ControllerIP) {
    if ((Original_ControllerIP == null)) {
        throw new global::System.ArgumentNullException("Original_ControllerIP");
    }
    else {
        this.Adapter.DeleteCommand.Parameters[0].Value = ((string)(Original_ControllerIP));
    }
    global::System.Data.ConnectionState previousConnectionState = this.Adapter.DeleteCommand.Connection.State;
    if (((this.Adapter.DeleteCommand.Connection.State & global::System.Data.ConnectionState.Open) 
                != global::System.Data.ConnectionState.Open)) {
        this.Adapter.DeleteCommand.Connection.Open();
    }
    try {
        int returnValue = this.Adapter.DeleteCommand.ExecuteNonQuery();
        return returnValue;
    }
    finally {
        if ((previousConnectionState == global::System.Data.ConnectionState.Closed)) {
            this.Adapter.DeleteCommand.Connection.Close();
        }
    }
}

参数就是这样：

this._adapter.DeleteCommand = new global::System.Data.SqlClient.SqlCommand();
        this._adapter.DeleteCommand.Connection = this.Connection;
        this._adapter.DeleteCommand.CommandText = @"DELETE FROM [ControllersData] WHERE (([ControllerIP] = @Original_ControllerIP) AND ((@IsNull_ControllerName = 1 AND [ControllerName] IS NULL) OR ([ControllerName] = @Original_ControllerName)) AND ((@IsNull_ControllerMac = 1 AND [ControllerMac] IS NULL) OR ([ControllerMac] = @Original_ControllerMac)) AND ((@IsNull_ControllerStatus = 1 AND [ControllerStatus] IS NULL) OR ([ControllerStatus] = @Original_ControllerStatus)))";
        this._adapter.DeleteCommand.CommandType = global::System.Data.CommandType.Text;
        this._adapter.DeleteCommand.Parameters.Add(new global::System.Data.SqlClient.SqlParameter("@Original_ControllerIP", global::System.Data.SqlDbType.NVarChar, 0, global::System.Data.ParameterDirection.Input, 0, 0, "ControllerIP", global::System.Data.DataRowVersion.Original, false, null, "", "", ""));
        this._adapter.DeleteCommand.Parameters.Add(new global::System.Data.SqlClient.SqlParameter("@IsNull_ControllerName", global::System.Data.SqlDbType.Int, 0, global::System.Data.ParameterDirection.Input, 0, 0, "ControllerName", global::System.Data.DataRowVersion.Original, true, null, "", "", ""));
        this._adapter.DeleteCommand.Parameters.Add(new global::System.Data.SqlClient.SqlParameter("@Original_ControllerName", global::System.Data.SqlDbType.NVarChar, 0, global::System.Data.ParameterDirection.Input, 0, 0, "ControllerName", global::System.Data.DataRowVersion.Original, false, null, "", "", ""));
        this._adapter.DeleteCommand.Parameters.Add(new global::System.Data.SqlClient.SqlParameter("@IsNull_ControllerMac", global::System.Data.SqlDbType.Int, 0, global::System.Data.ParameterDirection.Input, 0, 0, "ControllerMac", global::System.Data.DataRowVersion.Original, true, null, "", "", ""));
        this._adapter.DeleteCommand.Parameters.Add(new global::System.Data.SqlClient.SqlParameter("@Original_ControllerMac", global::System.Data.SqlDbType.NVarChar, 0, global::System.Data.ParameterDirection.Input, 0, 0, "ControllerMac", global::System.Data.DataRowVersion.Original, false, null, "", "", ""));
        this._adapter.DeleteCommand.Parameters.Add(new global::System.Data.SqlClient.SqlParameter("@IsNull_ControllerStatus", global::System.Data.SqlDbType.Int, 0, global::System.Data.ParameterDirection.Input, 0, 0, "ControllerStatus", global::System.Data.DataRowVersion.Original, true, null, "", "", ""));
        this._adapter.DeleteCommand.Parameters.Add(new global::System.Data.SqlClient.SqlParameter("@Original_ControllerStatus", global::System.Data.SqlDbType.NVarChar, 0, global::System.Data.ParameterDirection.Input, 0, 0, "ControllerStatus", global::System.Data.DataRowVersion.Original, false, null, "", "", ""));

Answer 1

您的查询期望有2个参数：original_controllerIP和IsNull_ControllerName，但是您只提供一个：

this.Adapter.DeleteCommand.Parameters[0].Value = ((string)(Original_ControllerIP));

您应该提供两个参数：

this.Adapter.DeleteCommand.Parameters[0].Value = ((string)(Original_ControllerIP));
this.Adapter.DeleteCommand.Parameters[1].Value = VALUE IN HERE;

如果您的查询只能接受一个参数，则可能需要刷新/更新数据适配器