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如何将用户输入乘以常数？

所有，

 

我正在尝试将用户输入数字乘以一个常数。 我需要使用最终号码（hoursBack）作为网址的一部分。

 

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
  );

得到以下错误-

 

在访问或评估'Multiply'时，不能将参数转换为数字[或矩阵]，daysBack * / * ### * / 24 / * ### * /

脚本编写回复：如何将用户输入乘以常数？

num（daysback）* 24

将使您摆脱dayback包含字符串的问题。

回复：如何将用户输入乘以常数？

问题是您正在从EditText（）字段输入daysBack，该字段返回字符串，而不是数字值。因此，需要对其进行转换。请参阅下面的代码

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：如何将用户输入乘以常数？

@txnelson谢谢。 我尝试了您的建议，但出现错误。 我已附上错误的快照