Question

我在Dataset中填充了一些值，但是当我不返回任何行时，我为那些返回的值小于0的东西做了其他部分。

这是代码

ds = GetCircleDetails(XY, txtSapIdNHQCircle.Text);

                if (ds.Tables[0].Rows.Count > 0)
                {
                    strState = ds.Tables[0].Rows[0]["R4GSTATENAME"].ToString();

                    if (Save(0))
                    {
                        BindDetails(false);
                    }
                }
                else
                {
                    //ClientScript.RegisterStartupScript(Page.GetType(), "erroralert", "checkRdValueForSingle('Please enter valid Lat/Long to submit the details')", true);
                    string latLongMes = "alert('Please enter valid Lat/Long to submit the details')";
                    ScriptManager.RegisterClientScriptBlock((sender as Control), this.GetType(), "alert", latLongMes, true);
                    txtLatNHQCircle.Value = "";
                    txtLongNHQCircle.Value = "";
                    ClientScript.RegisterStartupScript(Page.GetType(), "erroralert", "checkRdValueForSingle('')", true);
                    return;
                }
                if (lblStateNHQCircle.Text != strState)
                {
                    ClientScript.RegisterStartupScript(Page.GetType(), "erroralert", "checkRdValueForSingle('The entered lat/long is out of the existing State i.e., so could not save the record.');", true);
                    return;
                }                    
            }
            else
            {
                if (Save(0))
                {
                    BindDetails(false);
                }
            }
        }
        else if(Save(0))
        {
            BindDetails(false);
        }            
    }
    catch (Exception ex)
    {
        ClientScript.RegisterStartupScript(Page.GetType(), "erroralert", "alert('Error occured: Could not save change request data.');", true);
        ErrorLog.Save(ex.Message, ex.StackTrace, "ChangeRequestDetails - btnSave_Click", CurrentUserName);
        throw ex;
    }

GetCircleDetails(XY, txtSapIdNHQCircle.Text);的功能在下面

public DataSet GetCircleDetails(string xyCoordinate, string sapid)
{
    string ConnectionStringWFM = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionStringCR"].ConnectionString;

    DataSet ds = new DataSet();
    OracleConnection oraConn = new OracleConnection(ConnectionStringWFM);

    string strStoreProcedure = "GET_CIRCLENAME_XYPOINT";

    try
    {
        OracleCommand cmd = new OracleCommand(strStoreProcedure, oraConn);
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.Add(new OracleParameter("P_XYCORDINATE", xyCoordinate));
        cmd.Parameters.Add(new OracleParameter("P_SAPID", sapid));
        cmd.Parameters.Add(new OracleParameter("OUTR4GSTATENAME", OracleDbType.RefCursor, ParameterDirection.Output));
        cmd.Parameters.Add(new OracleParameter("OUTALLDETAILS", OracleDbType.RefCursor, ParameterDirection.Output));
        if (oraConn.State == ConnectionState.Closed) oraConn.Open();
        OracleDataAdapter da = new OracleDataAdapter(cmd);
        da.Fill(ds);
        return ds;
    }
    catch (Exception ex)
    {
        throw ex;
    }
    finally
    {

    }        
}

请提出为什么要在catch而不是else

中使用

更新

我收到错误消息

ClientScript.RegisterStartupScript(Page.GetType(), "erroralert", "alert('Error occured: Could not save change request data.');", true);

但是我应该把它当作

string latLongMes = "alert('Please enter valid Lat/Long to submit the details')"; ScriptManager.RegisterClientScriptBlock((sender as Control), this.GetType(), "alert", latLongMes, true);

Answer 1

要检查数据集是否为空，必须检查null和表计数。可以使用if(ds != null && ds.Tables.Count > 0 )

Answer 2

如果您在

中遇到错误

ClientScript.RegisterStartupScript

添加此代码

 Responce.Write("<script>alert('Your Text Here');</script>")

如果不大于0，则数据集值会捕获

2 个答案: