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如何將用戶輸入乘以常數？

所有，

 

我正在嘗試將用戶輸入數字乘以一個常數。 我需要使用最終號碼（hoursBack）作為網址的一部分。

 

local( 
{Name= "ABCD", daysBack = "7", formError = 1, rv},
   While( formError > 0,
    formError = 0;
    rv = Dialog(
     Title( "Select Extract criteria" ),
     VList(
      HList( "Name:", Name= EditText( Name) ),
      HList( "Days Back", daysBack = EditText( daysBack ) ),
      HList( Button( "OK" ), Button( "Cancel" ) )
     )
    );
    If( rv["button"] < 0,
     Throw( "Bye!" )
    );
    Name= rv["Name"];
    If( Name== "",
     formError
     ++);
    daysBack = rv["daysBack"];
    If( daysBack == "",
     formError
     ++);
    If( formError > 0,
     Dialog( "Missing required form input values" )
    );
   );
   Write( "Name=" || Name);
   hoursBack = daysBack*24;   //Getting an error here
   Status Msg( "Extracting data for " || Name);
   dt = queryData( "Newtable", hoursBack, Name); //Query data function is defined in a different part of the code
  );

得到以下錯誤-

 

在訪問或評估'Multiply'時，不能將參數轉換為數字[或矩陣]，daysBack * / * ### * / 24 / * ### * /

腳本編寫回复：如何將用戶輸入乘以常數？

num（daysback）* 24

將使您擺脫dayback包含字符串的問題。

回复：如何將用戶輸入乘以常數？

問題是您正在從EditText（）字段輸入daysBack，該字段返回字符串，而不是數字值。因此，需要對其進行轉換。請參閱下面的代碼

local( 
{Name= "ABCD", daysBack = "7", formError = 1, rv},
   While( formError > 0,
    formError = 0;
    rv = Dialog(
     Title( "Select Extract criteria" ),
     VList(
      HList( "Name:", Name= EditText( Name) ),
      HList( "Days Back", daysBack = EditText( daysBack ) ),
      HList( Button( "OK" ), Button( "Cancel" ) )
     )
    );
    If( rv["button"] < 0,
     Throw( "Bye!" )
    );
    Name= rv["Name"];
    If( Name== "",
     formError
     ++);
    daysBack = num(rv["daysBack"]);show(daysback);
    If( daysBack == "",
     formError
     ++);
    If( formError > 0,
     Dialog( "Missing required form input values" )
    );
   );
   Write( "Name=" || Name);
   hoursBack = daysBack*24;
   show("xx",hoursback) ;  //Getting an error here
   Status Msg( "Extracting data for " || char(Name));
   dt = queryData( "Newtable", hoursBack, Name); //Query data function is defined in a different part of the code
  );

回复：如何將用戶輸入乘以常數？

@txnelson謝謝。 我嘗試了您的建議，但出現錯誤。 我已附上錯誤的快照