bindingsource

问题 Please have a look to the following code and tell me why it does not move to the next record? I load data programmatically and fill tables in dataset. I could do this by wizard but I want to do it with my own code; because using wizard sometimes does not help understanding the real code behind it. Private Sub frmSystemOptions_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Try dsOptions = New DataSet loadOptions() bsInstitute = New BindingSource(dsOptions,

问题 I created the following class to model a person: namespace DataBindingTest { public enum colorEnum { Red, Green, Yellow, Blue, } class Person { private string _Name; private int _Age; private colorEnum _FavoriteColor; private bool _HasAllergies; public string Name { get { return _Name; } set { _Name = value; } } public int Age { get { return _Age; } set { _Age = value; } } public colorEnum FavoriteColor { get { return _FavoriteColor; } set { _FavoriteColor = value; } } public bool

问题 I am having difficulty refreshing windows forms controls that are using a BindingSource object. We have a CAB/MVP/SCSF client that I (actually “we” since it is a team effort) are developing that will interact with WCF services running on a remote server. (This is our first attempt at this, so we are in a learning mode). One of the calls (from the Presenter) to the service returns a DataSet that contains 3 DataTables, named “Contract”, “Loan” and “Terms”. Each table contains just one row. When

问题 I am loading data from two tables: institute and country. Institute has 3 columns: instId, name, countryId. And country has 2 columns: countryId, name where countryId is a foreign key from country table. I fill these two tables in dataset. I have datagridview and set its datasource to institute table in my dataset. I also create datagridviewcomboboxcolumn and bind it country table. Have a look to the following code: Public Class frmDGV Dim sqlConn As SqlConnection Dim dsOptions As DataSet Dim

问题 I've seen a lot of problems that are closely related to this but haven't found a solution, so I'm asking. I created a insert into query using the wizard and the tableAdapter that is automatically generated when you drag and drop the datasource into your Windows form. When I put all my data(is a sign up screen) and push sign up, the tableAdapter does the update with the following commands: this.userTableAdapter.InsertQuery(loginText.Text.Trim(), nameText.Text.Trim(), int.Parse(ageText.Text),

问题 I'm looking to resolve databinding to a Winforms datagridview using C# & .Net3.5. It's a bit involved and encompasses a few classes which I will provide code. I have have an Interface defined as such: public interface MyElement : IEditableObject { string Name { get; set; } string Description { get; set; } } I next have an abstaract class that inherits from MyElement defined as such: abstract public class MyElementAdapter : MyElement { private string myName; private string myDescription;

问题 UPDATE: I think i have found the problem. All my forms events that affect the binding source have this in the end: BndSource.ResetBindings(false); If i comment this line in my CheckedChanged event handler, the issue stops. But why? I have a very strange bug. I have a class property: public SqlByte AutomaticFlag { get; set; } I wanted to use checkbox to facilitate for showing this so in initial inding i do this: dtaAutomaticFlag.DataBindings.Add("Checked", BndSource, "AutomaticFlag", true);

问题 I'm using the filter method of Binding source in VB.net to filter results in a DataGridView based on the text in a search box. However, the idea of this search, is that it shows a row if any of the cells contain the text. So my filter string ends up looking like this: filter = "ProductId LIKE '%" & searchterm & "%'" & " OR ScanDate like '%" & searchterm & "%'" However, when I try to put the filter in the filter property, it complains, saying that it cannot convert the date column to text for

问题 I need to filter my Table2 with ID number and with year >=2010. This is my code for filter: Me.Table2BindingSource.Filter = "osobljeID ='" & OsobljeIDTextBox.Text & "'" And "Godina >=" & txtGodP.Text When I start app and click on button with this code I got: Conversion from string "osobljeID ='1'" to type 'Long' is not valid. When I use only one column to filter all is working but I need two. (e.g [Me.Table2BindingSource.Filter = "osobljeID ='" & OsobljeIDTextBox.Text & "'"]) but with "And"

问题 So I have been browsing about and there are a lot of explanations on how to move data from listbox to listbox. I have a listbox bound to a source from my SQL server and another unbound. My aim is to move the data from the first (LBsearch) to the second (LBselect) and back. I have seen people say use LBselect.Items.Add(LBsearch.SelectedItem) however it doesn't return data and instead shows System.Data.DataRowView . I've tried many different suffixes and all show this apart from LBsearch.text .