Convert textbox text to integer

Question

I need to convert the text in the textbox of my xaml code to an integer value in C   I am using  NET 4 0 and Visual Studio 2010  Is there a way to do it in xaml tags itself or do i need to write a converter in C sharp  I tried the following but is not working   Convert ToInt32 this txtboxname Text    Any help is much appreciated  Thanks

User · Answer

You don t need to write a converter  just do this in your handler codebehind   int i   Convert ToInt32 txtMyTextBox Text     OR  int i   int Parse txtMyTextBox Text     The Text property of your textbox is a String type  so you have to perform the conversion in the code

User · Answer

Example   int x   Convert ToInt32 this txtboxname Text    1   You dont need the  this  txtboxname Text   x ToString      The x ToString   makes the integer into string to show that in the text box   Result    You put number in the text box  You click on the button or something running the function  You see your number just bigger than your number by one in your text box

User · Answer

If your SQL database allows Null values for that field try using int  value like that    if  this txtboxname Text          this txtboxname text    null       value   null  else      value   Convert ToInt32 this txtboxname Text     Take care that Convert ToInt32 of a null value returns 0    Convert ToInt32 null  returns 0

User · Answer

int num   int Parse textBox Text     try this  It worked for me

User · Answer

Suggest do this in your code-behind before sending down to SQL Server    int userVal   int Parse txtboxname Text     Perhaps try to parse and optionally let the user know   int  userVal  if  int TryParse txtboxname Text  out userVal       DoSomething userVal Value     else   MessageBox Show  Hey  we need an int over here           The exception you note means that you re not including the value in the call to the stored proc  Try setting a debugger breakpoint in your code at the time you call down into the code that builds the call to SQL Server   Ensure you re actually attaching the parameter to the SqlCommand   using  SqlConnection conn   new SqlConnection connString         SqlCommand cmd   new SqlCommand sql  conn       cmd Parameters Add   ParamName   SqlDbType Int       cmd Parameters   ParamName   Value   newName              conn Open        string someReturn    string cmd ExecuteScalar                Perhaps fire up SQL Profiler on your database to inspect the SQL statement being sent executed

[c#] Convert textbox text to integer

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