Converting a String to Integer [C#]

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  16 years ago

  by Shaitan00

  Shaitan00

  , United States

  Joined 17 years ago

  Given a DropDownList box [ddlHour] and a DateTime variable [dtSelected].
  I want to update the hour in dtSelected.hour with the ddlHour.SelectedValue however when I try to do the following directly:    
  dtSelected.Minute = ddlMinute.SelectedValue;
  

  
  I get the following error:
  1) Cannot implicitly convert type 'string' to 'int'
  2) Property or indexer 'System.DateTime.Hour' cannot be assigned to -- it is read only
  

  
  So I guess I have 2 questions; how could I convert the string returned by ddlHour.SelectedValue into an Integer so I can update the dtSelected.hour AND why am I seeing that read-only error? Am I not doing this right at all?
  

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  16 years ago

  by Rollershade

  Colin Harman MACITP

  West Sussex, England, Australia

  Joined 19 years ago

  to convert data types, there is the Convert keyword, use like
  

  
  int Value1 = 0;
  string Value2 = Convert.toString(Value1);
  

  
  FOR 2 'I want to update the hour in dtSelected.hour' Can you show the code you use, thanks

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  16 years ago

  by James Crowley

  James Crowley

  London, United Kingdom

  Joined 20 years ago

  1) for the type conversion, you'll need to do
  dtSelected.Minute = Convert.ToInt32(ddlMinute.SelectedValue)
  

  
  2) For the problem with assignment - you'll have to create a new DateTime object - using the values from the existing DateTime object, or use the AddHours/AddMinutes etc methods, if that's appropriate.

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