ADO.NET :: Convert String To Int Before Updating Database Table?
Sep 22, 2010
I have a form in which I display data from a database table, change the data and then update the database table. The form consists of textboxes, so all data displayed in the form is string. However - one data is int in the database table (the rest is varchar), so I need to convert it from string to int when I update the database table. How do I do it?
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And, strangely enough, the same code doesn't work with parameters. How is that?:
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Exception Details:
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The code:
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[Code]....
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why this update is failing? The table is connected to OK and there are appropriate values in the parameters to the subroutine, and yet the record in the table remains unchanged. I am using exactly the same code (with different parameters, obviously) to update another table and this continues to work fine.
Public Shared Sub SaveMathsSettingOptions(ByVal ID As Integer, ByVal Auto As String, ByVal Repeats As Integer, ByVal Weekly As String, ByVal ClassSheets As Integer, ByVal HomeSheets As Integer)
Dim con As New MySqlConnection(_connectionString)
Dim ret As String
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cmd.Parameters.AddWithValue("@maths_class_sheets", ClassSheets)
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cmd.Parameters.AddWithValue("@centreID", ID)
Try
con.Open()
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'MessageBox.Show("Error Connecting to Database: " & myerror.Message)
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Finally
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End Try
End Sub
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I have two tables master and comp table. In master table, I have columns called LB1, LB2, LB1_ID, LB2_ID and in my comp table I have ID and CompName. I need to update my master table the following way
If LB1 in master table has a value of 'XYZ' then I need to find that value in Comp Table in column compName and then put the ID from comp table to master table in LB1
master
LB1 LB2 LB1_ID LB2_ID
XYZ HIJ
ABC KLM
DEF RAW
PQR VQS
Comp
ID CompName
1 XYZ
2 ABC
3 RAW
4 DEF
5 VQS
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7 KLM
8 PQR
I need to poulate my master table like this
master
LB1 LB2 LB1_ID LB2_ID
XYZ HIJ 1 6
ABC KLM 2 7
DEF RAW 4 3
PQR VQS 8 5
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I am trying to track members volunteering. I have a table that has all our members information and another table I want to update what they volunteer for throughout the year. I have a ddl that they select a last name and it populates first name, last name and spouse in a formview. This all works. There are a couple of other textboxes that need to be filled out. When I try and run an update into the volunteer table I get no errors and page shows the meber was updated. However, when I go into the volunteer table, there is no data.
[Code]....
I don't understand why it is not updating into the table. Especially since I am getting no errors.
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I have stepped through this code to test it and I am puzzled as to why the update isn't going through to the DB. When I run the SQL statement in SQL editor it updates fine. All variables are getting the proper values when I step through.
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I'm using this code to generate my table:
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And then im using this code after submiting:
[Code]....
But the ID from the Request.Form is 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26, etc.
protected void Page_Load(object sender, EventArgs e)
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I have a gridview which contains a dropdownlist inside a TemplateField. The ddl appears correctly and seems to work ok but it isn't updating the table despite being bound to a field.
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Oct 15, 2010
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Dropdownlist is not updating the table
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