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# Beginner Question - Data Binding to a TextBox

 P: n/a Can someone help with the following problem TextBox1 is bound to a dataset and shows a value of "5" I am trying to use that value as follows Variable1 = Val(TextBox1.Text) The result that I'd expect is that Variable1 would equal 5. The result that I get is that Variable1 equals 0 How do I get Variable1 to equal 5? Thanks, Jim (the beginner) I am using Visual Basic in Visual Studio.Net Nov 21 '05 #1
8 Replies

 P: n/a Try Variable1 = TextBox1.Text "jimscott77" wrote in message news:11**********************@o13g2000cwo.googlegr oups.com... Can someone help with the following problem TextBox1 is bound to a dataset and shows a value of "5" I am trying to use that value as follows Variable1 = Val(TextBox1.Text) The result that I'd expect is that Variable1 would equal 5. The result that I get is that Variable1 equals 0 How do I get Variable1 to equal 5? Thanks, Jim (the beginner) I am using Visual Basic in Visual Studio.Net Nov 21 '05 #2

 P: n/a Assuming that you see 5 in the text box at run time. You could try using Variable1 = ctype(TextBox1.Text, integer) This is the .Net casting function -- Weeims "jimscott77" wrote: Can someone help with the following problem TextBox1 is bound to a dataset and shows a value of "5" I am trying to use that value as follows Variable1 = Val(TextBox1.Text) The result that I'd expect is that Variable1 would equal 5. The result that I get is that Variable1 equals 0 How do I get Variable1 to equal 5? Thanks, Jim (the beginner) I am using Visual Basic in Visual Studio.Net Nov 21 '05 #3

 P: n/a as TEXT the result is "" as VAL the result is 0 Nov 21 '05 #4

 P: n/a as TEXT the result is "" as VAL the result is 0 Nov 21 '05 #5

 P: n/a Yes, the 5 is visible at run time. With Variable1 = ctype(TextBox1.Text, integer) I get the following error msg. An unhandled exception of type 'System.InvalidCastException' occurred in microsoft.visualbasic.dll Additional information: Cast from string "" to type 'Integer' is not valid. It seems the value in the text box (5) is not recognized and that TextBox1.Text = NULL or "" Does the fact that TextBox1 is bound to a dataset mean that I have to address it with some index value? (Just a shot in the dark). Thanks again for your help. Nov 21 '05 #6

 P: n/a Update: I actually have three such values that I am trying to use and am having the same problem on all 3. TextBox1.Text shows a value of 5 but has a value of "" TextBox2.Text shows a value of 18 but has a value of "" TextBox3.Text shows a value of 24 but has a value of "" However: At runtime if I change the value in any one of the textboxes then the values of all the textboxes are update When I change the value in TextBox1 to 6 then TextBox1.Text shows a value of 6 and has a value of 6 TextBox2.Text shows a value of 18 but has a value of 18 TextBox3.Text shows a value of 24 but has a value of 24 (I am testing this by having the values of 3 other textboxes reflect the values of TextBox1, 2, & 3) How do I get the values to reflect what is shown without changing one of the original values? Thanks again, Jim (the beginner) Nov 21 '05 #7

 P: n/a jimscott77, This seems very strange. Are you sure that the textbox with the 5 in it is really named TextBox1? At design time, click the textbox to select it and be sure that the name in the Properties window is actually TextBox1. Kerry Moorman "jimscott77" wrote: Yes, the 5 is visible at run time. With Variable1 = ctype(TextBox1.Text, integer) I get the following error msg. An unhandled exception of type 'System.InvalidCastException' occurred in microsoft.visualbasic.dll Additional information: Cast from string "" to type 'Integer' is not valid. It seems the value in the text box (5) is not recognized and that TextBox1.Text = NULL or "" Does the fact that TextBox1 is bound to a dataset mean that I have to address it with some index value? (Just a shot in the dark). Thanks again for your help. Nov 21 '05 #8

 P: n/a I have verified the names, additionally see my follow-up note here or my 2nd posting on this topic. Thanks for your feedback. Jim Nov 21 '05 #9

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