eval a string into an object

[bsw2112]

say I have a textbox with attribute id="test_1"

How could I reference this id if I am in a loop

ex.

for i as Integer = 0 to 5
' I would like to give this textbox a value, I thought I could do something like
   Eval("test_" & i).Value = "someValue"
' but that did not work, I also tried to do 
  dim tmpTB as Textbox = Ctype("test_" & i, TextBox)
    
Next

Is there a way to do this?

bsw

[timeshifter]

If the text box is just on the page, it's just like normal application development: test_1.Text="....."

If it's within another object, such as a GridView, you need to do a FindControl for it:
Dim myTxt as TextBox = GridView1.FindControl("test1")
myTxt.Text="......"

[stanav]

say I have a textbox with attribute id="test_1"

How could I reference this id if I am in a loop

ex.

for i as Integer = 0 to 5
' I would like to give this textbox a value, I thought I could do something like
   Eval("test_" & i).Value = "someValue"
' but that did not work, I also tried to do 
  dim tmpTB as Textbox = Ctype("test_" & i, TextBox)
    
Next

Is there a way to do this?

bsw

In order to do this, you have to put the textboxes into a collection (array, list, arraylist...) then looping thru the collection.

[bsw2112]

Thanks timeshifter and stanav


timeshifter, I went with your approach which resulted in this code

 
If PlanData.Rows.Count > 0 Then
                For i As Integer = 0 To PlanData.Rows.Count - 1
                    Dim tmpDTB As New DoubleTextBox
                    tmpDTB = form1.FindControl("milestone2008_" & i + 1)
                    tmpDTB.Value1 = PlanData.Rows(i).Item(0)
                    tmpDTB.Value2 = GeneralUtilites.ConvertDate(PlanData.Rows(i).Item(1), "CAN")
                Next

            End If

instead of this code which was crazy. form1.FindControl is a blessing

If PlanData.Rows.Count > 0 Then
Select Case (PlanData.Rows.Count)
                    Case 1

                        milestone2008_1.Value1 = PlanData.Rows(0).Item(0)
                        milestone2008_1.Value2 = GeneralUtilites.ConvertDate(PlanData.Rows(0).Item(1), "CAN")

                    Case 2
                        milestone2008_1.Value1 = PlanData.Rows(0).Item(0)
                        milestone2008_1.Value2 = GeneralUtilites.ConvertDate(PlanData.Rows(0).Item(1), "CAN")

                        milestone2008_2.Value1 = PlanData.Rows(1).Item(0)
                        milestone2008_2.Value2 = GeneralUtilites.ConvertDate(PlanData.Rows(1).Item(1), "CAN")

Case X                   
etc....

                End Select
End If

stanav

In order to do this, you have to put the textboxes into a collection (array, list, arraylist...) then looping thru the collection.

how do I go about putting controls from my page to a collection that I can then manipulate which would alter the value of the actual control on the page.

In other words say I have the 3 textboxes bellow.

<input name="foo1" id="foo1" /><br />
<input name="foo2" id="foo2" /><br />
<input name="foo3" id="foo3" /><br />

How would I add these three boxes to a collection and then use something like collection.value to make the three like so

<input name="foo1" id="foo1" value="foo1value" /><br />
<input name="foo2" id="foo2" value="foo2value" /><br />
<input name="foo3" id="foo3" value="foo3value" /><br />

bsw

[mendhak]

You don't need to. You can loop through the collection. If it's sitting in a table, div or simply the page, you can iterate through the .Controls collection of the object and test its type.