I have a WPF Project where I want to save DataRows from a DataGrid into an "options" class and retrieve those variables in another window.
Thats how I save my Variable from my DataGrid into my "options" Class (mainWindow.xaml.cs):
options.title = Convert.ToString((showEntries.SelectedItem as DataRowView).Row["title"]);
This Variable im saving via a getter and setter (options.cs):
public string Title
{
get { return title; }
set { title = value; }
}
And now I want to retrieve the saved variable in another window(updateDatabse.xaml):
private void getUpdateEntries()
{
Options returnValues = new Options();
titleBox.Text = returnValues.Title;
}
My Question is: Why is my textbox "titleBox" empty when running my code.
If the logic of your task does not provide for the creation of several instances of classes (and as far as I understand your explanations, this is so), then you can use the Singlton implementation.
Example:
public class Options
{
private string title;
public string Title
{
get { return title; }
set { title = value; }
}
private Options() { }
public static Options Instance { get; } = new Options();
}
Options.Instance.Title = Convert.ToString((showEntries.SelectedItem as DataRowView).Row["title"]);
private void getUpdateEntries()
{
titleBox.Text = Options.Instance.Title;
}
You mixed things up.
private void getUpdateEntries()
{
Options returnValues = new Options();
returnValues.title = Convert.ToString((showEntries.SelectedItem as DataRowView).Row["title"]);
titleBox.Text = returnValues.Title;
}
Related
I need some help regarding a driver I`m building. I have a structure of some data in my static class. The data of this structure object has to be manipulated from outside my driver class. Into my class I have to prepare some textBoxes, which can be assigned and used from outside the class. Each structure value becomes one textBox. Now my problem is, I have to connect this dynamic changable structure values with the corresponding textBox. I have to use dataBinding, cause there will be a huge amount of data I have to use.
Pls check out the following code snippet for understanding:
public static class driver
{
#region " data preparation "
//structure definition
public struct _data
{
public string moduleName;
public string dynamicNumber1;
//...
}
//instance object of struct
private _data moduleData = new _data();
//get;set property
public _data pModuleData
{
get
{
return moduleData;
}
set
{
moduleData = value;
}
}
#endregion
//build data binding(s) for each single "moduleData.structureItem"
//???????????????????? moduleData_itemBinding_ModuleName
//???????????????????? moduleData_itemBinding_dynamicNumber1
//...
#region " form elements preparation for external assignments "
//instance of forms objects, data can be assigned and used outside of this public static class
public static System.Windows.Forms.TextBox textBox_ModuleName = new System.Windows.Forms.TextBox();
public static System.Windows.Forms.TextBox textBox_dynamicNumber1 = new System.Windows.Forms.TextBox();
#endregion
#region " class initialisation "
static driver()
{
// class initialisation part
textBox_ModuleName.DataBindings = moduleData_itemBinding_ModuleName; //assign databindings from above ???????????
textBox_ModuleName.DataBindings = moduleData_itemBinding_dynamicNumber1; //adding databindings from above ???????????
}
#endregion
}
Thanks for help!
KISS.
I think it is possible to make as follows. Define your class:
public class Driver
{
public Driver(TextBox moduleName, TextBox dynamicNumber)
{
textBox_ModuleName = moduleName;
textBox_DynamicNumber = dynamicNumber;
textBox_ModuleName.DataBindings.Add("Text", this, "ModuleName");
textBox_DynamicNumber.DataBindings.Add("Text", this, "DynamicNumber");
}
public string ModuleName { get; set; }
public string DynamicNumber { get; set; }
private TextBox textBox_ModuleName;
private TextBox textBox_DynamicNumber;
}
Then create textboxes on the form:
var textBox1 = new TextBox { Parent = this };
var textBox2 = new TextBox { Parent = this, Top = 30 };
Create instance of your class and pass to it these textboxes:
var driver = new Driver(textBox1, textBox2);
driver.ModuleName = "foo";
driver.DynamicNumber = "bar";
// data will be appear in the textboxes
It works.
I have a DataGrid in my View as shown below.,
My Question is how can I Append the values from the textboxes to the row datagrid
I have make sure that the Model has All the properties, When I click on the Add button it overwrites the dataGrid and shows only one latest record the and my ViewModel look like this:
class BatchItemsViewModel : ViewModelBase
{
public SearchItemsModel msearchItems { get; set; }
ObservableCollection<SearchItemsModel> _BatchItemsGrid;
public ObservableCollection<SearchItemsModel> BatchItemsGrid
{
get { return _BatchItemsGrid; }
set
{
_BatchItemsGrid = value;
OnPropertyChanged("BatchItemsGrid");
}
}
private ICommand _addDataToBatchGrid;
public ICommand addDataToBatchGrid
{
get
{
return _addDataToBatchGrid;
}
set
{
_addDataToBatchGrid = value;
}
}
public BatchItemsViewModel()
{
msearchItems = new SearchItemsModel();
addDataToBatchGrid = new RelayCommand(new Action<object>(AddDataInBatchGrid));
}
public void AddDataInBatchGrid(object obj)
{
ObservableCollection<SearchItemsModel> batchGridData = new ObservableCollection<SearchItemsModel>();
var data = new SearchItemsModel
{
BatchNumber = msearchItems.BatchNumber,
MFDDate = msearchItems.MFDDate,
ExpiryDate = msearchItems.ExpiryDate,
Quantity = msearchItems.Quantity,
};
batchGridData.Add(data);
BatchItemsGrid = batchGridData; // HERE I am overwriting the datagrid
//How can I Append the batchGridData to BatchItemsGrid (BatchItemsGrid.Append(batchGridData)???)
}
}
NOTE: I have gone through the other threads as well in the community for the similar posts but I couldn't find the appropriate and please correct me if I am going in wrong direction.
public void AddDataInBatchGrid(object obj)
{
var data = new SearchItemsModel
{
BatchNumber = msearchItems.BatchNumber,
MFDDate = msearchItems.MFDDate,
ExpiryDate = msearchItems.ExpiryDate,
Quantity = msearchItems.Quantity,
};
this.BatchItemsGrid.Add(data);
}
...Should do the trick. (don't replace the whole collection, just add items to it and let the notification events handle the UI updates)
What I would like to do is to populate a drop down menu from a database.
First of all I plan to use a combo box.
I have created an object that contains the data that I need to take from the database. The object is as follows
namespace RLMD
{
public class FlashCardLevel
{
private int intFCLId;
private String strFCLName;
public FlashCardLevel(int intFCLId, String strFCLName)
{
this.intFCLId = intFCLId;
this.strFCLName = strFCLName;
}
public int IntFCLId
{
get { return intFCLId; }
set { this.intFCLId = value; }
}
public String StrFCLName
{
get { return strFCLName; }
set { this.strFCLName = value; }
}
}
}
What I need to do is to add a list of items from a database, but for ease of use I have simulated given some sample data.
public List<FlashCardLevel> Rifle(List<FlashCardLevel> fcLevel)
{
fcLevel.Add(new FlashCardLevel(1, "Severe"));
fcLevel.Add(new FlashCardLevel(2, "Moderate"));
fcLevel.Add(new FlashCardLevel(3, "Mild"));
fcLevel.Add(new FlashCardLevel(4, "Slight"));
return fcLevel;
}
I'm calling the method here.
List<FlashCardLevel> fcLevel = new List<FlashCardLevel>();
talkToDatabase.Rifle(fcLevel);
this.comboCardLevel.DataSource = fcLevel;
this.comboCardLevel.DisplayMember = "Name";
this.comboCardLevel.ValueMember = "Value";
The combobox is displaying no information.
I would appreciate any help
Updated:
The DisplayMember Property should be referring to FlashCardLevel (class), Property StrFCLName and ValueMember should be pointing to IntFCLId.
List<FlashCardLevel> fcLevel = new List<FlashCardLevel>();
talkToDatabase.Rifle(fcLevel);
this.comboCardLevel.DataSource = listFromDatabase;
this.comboCardLevel.DisplayMember = "StrFCLName";
this.comboCardLevel.ValueMember = "IntFCLId";
The DisplayMember and ValueMember should point to your properties name.
this.comboCardLevel.DisplayMember = "IntFCLId";
this.comboCardLevel.ValueMember = "StrFCLName";
I just want my ComboBox to show me the
FullName of objects in List(Curator),
but it show me the same "object.FullName" multiple times :-(
-
Basically, it work cause it show me the FullName of ONE of the Curator,
and the good amount of times,
but it show me the same ONE !
public partial class SGIArt : Form
{
public static Gallery gal = new Gallery(); // from a dll i made
List<Curator> curList = new List<Curator>();
public SGIArt()
{
InitializeComponent();
comboCur.DataSource = curList;
comboCur.ValueMember = null;
comboCur.DisplayMember = "FullName";
UpdateCurList();
}
public void UpdateCurList()
{
curList.Clear();
foreach (Curator cur in gal.GetCurList())
// from the same dll : Curators curatorsList = new Curators();
{
curList.Add(cur);
}
}
private void comboCur_SelectedIndexChanged(object sender, EventArgs e)
{
if (comboCur.SelectedValue != null)
{
//show info in textBox (that work fine)
}
}
}
Curator class :
public class Curator : Person
{
private int id;
private double commission;
const double commRate = 0.25;
private int assignedArtists = 0;
public int CuratorID
{
get
{
return id;
}
set
{
id = value;
}
}
...
public Curator()
{
}
public Curator(string First, string Last, int curID)
: base(First, Last) // from : public abstract class Person
{
id = curID;
commission = 0;
assignedArtists = 0;
}
Edit: You might be looking for this answer.
I do not see the FullName member in your code snippet. I think you are looking for something like this:
List<Curator> curList = new List<Curator>();
public SGIArt()
{
InitializeComponent();
comboCur.DataSource = datasource;
comboCur.ValueMember = null;
comboCur.DisplayMember = "FullName";
UpdateCurList();
}
List<string> datasource()
{
List<string> datasource = new List<string>();
foreach(Curator curator in curList)
{
datasource.Add(curator.FullName)//this assume FullName is an accesible member of the Curator class and is a string.
}
return datasource;
}
The comboBox shows you object.FullName, because this is what you are telling it. The curList is empty at the time when you bind it.
You can update your list before using it:
public SGIArt()
{
InitializeComponent();
UpdateCurList();
comboCur.DataSource = curList;
comboCur.ValueMember = null;
comboCur.DisplayMember = "FullName";
}
It seems that, due to an unknown cause, I am now unable to edit anything in my DataGridView. The DGV's ReadOnly property value is false, and all columns except for one all have the ReadOnly property set to false as well.
I'm beginning to think that it may be due to a special value I tried adding to one of my classes, one that I only wanted to be modified within the class, but still read only to the public. I don't think that value is messing with anything else, but none the less, here is the relevant portion of my code:
private void loaderWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
loadingBar.Value = e.ProgressPercentage;
if (e.UserState != null)
{
savefiles.Add((SaveFile)e.UserState);
}
}
Where savefiles is a BindingList, and where SaveFile is my class:
public class SaveFile
{
private string d_directory;
private int d_weirdnumber;
private bool d_isautosave;
private string d_fullname;
private string d_datatype;
private string d_owner;
private bool d_isquicksave;
private string d_title;
private string d_gametime;
public SaveFile() { }
public SaveFile(string directory, int weirdnumber, bool isautosave, string fullname, string datatype, string owner, bool isquicksave, string title)
{
d_directory = directory;
d_weirdnumber = weirdnumber;
d_isautosave = isautosave;
d_fullname = fullname;
d_datatype = datatype;
d_owner = owner;
d_isquicksave = isquicksave;
d_title = title;
}
public string Gametime
{
get { return d_gametime; }
}
public string Datatype
{
get { return d_datatype; }
set { d_datatype = value; }
}
public string Title
{
get { return d_title; }
set { d_title = value; }
}
public bool IsQuickSave
{
get { return d_isquicksave; }
set { d_isquicksave = value; }
}
public bool IsAutoSave
{
get { return d_isautosave; }
set { d_isautosave = value; }
}
public string Directory
{
get { return d_directory; }
set { d_directory = value; }
}
public string FullName
{
get { return d_fullname; }
set
{
d_fullname = value;
string[] split = value.Split(new char[]{'-'});
foreach (string str in split)
{
if (System.Text.RegularExpressions.Regex.IsMatch(str, "^\\d\\d:\\d\\d:\\d\\d$"))
{
d_gametime = str;
}
}
}
}
public int Weirdnumber
{
get { return d_weirdnumber; }
set { d_weirdnumber = value; }
}
public string Owner
{
get { return d_owner; }
set { d_owner = value; }
}
}
Gametime is that special property I mentioned earlier. It doesn't have a set function, but according to this, I should be in the clear, right?
Can anyone then tell me why I may not be able to edit any of the DGV cells?
EDIT: I just found out that not setting AutoGenerateColumns to false allows me to edit again, but I still don't know why.
After several hours, a friend finally took a look at it over Remote Desktop. He wrote a function to force all columns to have a non read-only status, and go figure, it worked. So we looked at the column properties in the editor, and somehow... I don't know why... they were all set to Read only. I swear I checked them 4 times before.
The lesson of this story (I guess): When in doubt, check your settings. When not in doubt, become doubtful. Otherwise, file a bug report to Microsoft :\