I am working with WinForm in this i have 3 RadioButton one ComboBox and have three BindingSource
I want that when I check any of the RadioButtons, the values from the particular DataSources get bound to the ComboBox's ValueMember and DisplayMember.
The program has a SQL query where I want to send value based on the checked radio button.
private void rdbMed_CheckedChanged(object sender, EventArgs e)
{
cmbStock.DataSource = null;
cmbStock.DataSource = this.medicinesBindingSource;
this.cmbStock.DisplayMember = ""; //i want to bind "Med_ID" from medicinesBindingSource
this.cmbStock.ValueMember = ""; //"Med_Name"
}
private void rdbCat_CheckedChanged(object sender, EventArgs e)
{
cmbStock.DataSource = null;
cmbStock.DataSource = this.categoriesBindingSource;
this.cmbStock.DisplayMember = ""; //"category_Name"
this.cmbStock.ValueMember = ""; // category_ID"
}
private void rdbPharm_CheckedChanged(object sender, EventArgs e)
{
cmbStock.DataSource = null;
cmbStock.DataSource = this.pharmaceuticalBindingSource;
this.cmbStock.DisplayMember = "";// "Pharma_Name"
this.cmbStock.ValueMember = "";// "Pharma_ID"
}
Bellow are the parameter of the Query. It will help you to understand what I want to achieve.
if (rdbMed.Checked)
{
con.cmd.Parameters.AddWithValue("#Med_ID", cmbStock.ValueMember);
con.cmd.Parameters.AddWithValue("#category_ID", "");
con.cmd.Parameters.AddWithValue("#Pharma_ID", "");
}
else if (rdbCat.Checked)
{
con.cmd.Parameters.AddWithValue("#Med_ID", "");
con.cmd.Parameters.AddWithValue("#category_ID", cmbStock.ValueMember);
con.cmd.Parameters.AddWithValue("#Pharma_ID", "");
}
else if (rdbPharm.Checked)
{
con.cmd.Parameters.AddWithValue("#Med_ID", "");
con.cmd.Parameters.AddWithValue("#category_ID", "");
con.cmd.Parameters.AddWithValue("#Pharma_ID", cmbStock.ValueMember);
}
Easiest and the least pain way of doing this is resolving it inside SQL command and way to do it is cast your columns with AS VM and AS DM and make your DisplayMember = "DM" and ValueMember = "VM", so if you have sql query like SELECT USERID AS VM, NAME AS DM or SELECT PRODUCTID AS VM, NAME AS DM it will both work.
Problem later is if you do something with code and you may make mistakes trying to get USERID from databinding but it is instead VM. To avoid this you could "double select" values in query like SELECT USERID, NAME, ...., USERID AS VM, NAME AS DM this way you will have VM and DM for your controls but still hold original columns.
Related
I have a datagridview and it's source is a bindingSource. I filter them by Id, name and date.
Also have clear button for clearing filters.
private void b_clear_Click(object sender, EventArgs e)
{
txt_filterNum.Clear();
txt_filterName.Clear();
if (File.Exists(inputpath))
{
//MyLoad();
bindingSource1.Filter = string.Empty;
timeFilter.CustomFormat = " ";
timeFilter.Text = null;
timeFilter.Format = DateTimePickerFormat.Custom;
gridFilter.Update();
gridFilter.Refresh();
}
}
I'm having a really hard time filtering this gridview and clearing the filters.
Here I add my filter too.
bindingSource1.Filter = $"Flight_Date = #{timeFilter.Value:M/dd/yyyy}# AND {gridFilter.Columns[indexRoleName].HeaderText} LIKE '%{txt_filterName.Text}%' AND {gridFilter.Columns[indexRoleNum].HeaderText} LIKE '%{txt_filterNum.Text}%'";
I call it in textboxes_changed and datetimePicker_valuechanged.
I can't filter the values properly, When I try to delete the filtering I have done, I can not get a reset in the datagridview.
I have two comboboxes which I populate using my GetAllCities() method in the CtrlMap.
My idea is, whenever I select another city on the ddFrom it should databind all the cities to ddTo (and later on remove the exact same selected, so user won't be able to select same city as point From and To).
However, Whenever I select something on ddFrom, ddTo populates (as it should), but SelectedIndex gets the same as the ddFrom. Same goes in the opposite way. If I select a city, lets say New York on ddTo it is also selected on ddFrom.
In the GUINewBooking.Designer.cs there's only this event handler registered: this.ddFrom.SelectedIndexChanged += new System.EventHandler(this.ddFrom_SelectedIndexChanged);
ddTo has no event handler registered. Any ideas?
public partial class GUINewBooking : Form
{
private CtrlMap ctrlMap;
public GUINewBooking()
{
InitializeComponent();
ctrlMap = new CtrlMap();
ddFrom.DataSource = ctrlMap.GetAllCities();
ddFrom.DisplayMember = "name";
}
private void ddFrom_SelectedIndexChanged(object sender, EventArgs e)
{
ddTo.DataSource = ctrlMap.GetAllCities();
ddTo.DisplayMember = "name";
}
}
I believe it's because you are using the same data source. You might need to
private void ddFrom_SelectedIndexChanged(object sender, EventArgs e)
{
CtrlMap ctrlMapTo = new CtrlMap();
ddTo.DataSource = ctrlMap2.GetAllCities();
ddTo.DisplayMember = "name";
}
The answer can be found Strange behavior of Windows Forms combobox control
Each combobox DataSource property should be assigned to a different BindingSource object.
Example:
cmbDataType1.DataSource = new BindingSource(datasource, "");
cmbDataType2.DataSource = new BindingSource(datasource, "");
Or in my particular case:
ddFrom.DataSource = new BindingSource(ctrlMap.GetAllCities(), "");
ddTo.DataSource = new BindingSource(ctrlMap.GetAllCities(), "");
One article has Name and Price properties. I use Name property to display articles inside combobox cmbDataList like this
public Form1()
{
InitializeComponent();
cmbDataList.DataSource = GetData();
cmbDataList.DisplayMember = "Name";
}
After user selected the preffered article I want to use it's Price property to assign to textbox on the same form. So, how to access to that Price property?
private void cmbDataList_SelectedIndexChanged(object sender, EventArgs e)
{
//var sel = cmbDataList.SelectedItem;
}
You have to cast SelectedItem to proper object.
private void cmbDataList_SelectedIndexChanged(object sender, EventArgs e)
{
var sel = (YourObject)cmbDataList.SelectedItem;
txt.Text = sel.Price.ToString();
}
Unless all names are unique, you're going to need a unique identifier to reference, for example an articleID.
From here, set the ComboBox's ValueMember like so;
cmbDataList.ValueMember = "ID";
then you can get your value on the event handler;
private void cmbDataList_SelectedIndexChanged(object sender, EventArgs e)
{
var sel = cmbDataList.SelectedValue;
//From here you're going to need to find your article with that particular ID.
}
Alternatively. You could have your DisplayMember as the article name, and the price as the ValueMember, then get it in the event handler for SelectedIndexChanged in the same way i put above. SelectedValue will then return the price;
cmbDataList.ValueMember = "Price";
private void cmbDataList_SelectedIndexChanged(object sender, EventArgs e)
{
var yourSelectedPrice = cmbDataList.SelectedValue;
}
Assuming GetData() returns a table, you need to write the ValueMember also... like this:
InitializeComponent();
cmbDataList.DataSource = GetData();
cmbDataList.DisplayMember = "Name";
cmbDataList.ValueMember = "Price";
Now, your selected display will be synced with the value and you will be able to use it..
Get more info in here:
Populate combobox
You Need to set ValueMember You can set in this way
cmbDataList.ValueMember = "ID";
then you write the code on cmbDataList_SelectedIndexChanged Event
May be this will help you
var sel = cmbDataList.SelectedValue
I have a table called me : with 3 columns: Name,SecName,Code
void GridView1_RowEditing(Object sender, GridViewEditEventArgs e)
{
name = "";
subname = "";
code = "";
}
How can I get the name,subname,code from selected row into those variables.
Thanks
I think you should be able to get the currently bound item by doing:
((ObjectBoundToGridRow)e.Item.DataItem).<X>
So you can extract it from the source object, but you can also do:
string name = DataBinder.GetPropertyValue(e.Item.DataItem, "Name");
HTH.
Currently my repository returns an IQueryable object that lists the data from my DB and I bind this to a BindingSource for use in a grid:
public void BindTo(IQueryable elements)
{
BindingSource source = new BindingSource();
source.CurrentChanged += new EventHandler(source_CurrentChanged);
source.DataSource = elements;
elementNavigator.BindingSource = source;
elementGridView.DataSource = source;
}
This works great. However I am wanting to do some stuff when a user clicks an row in the grid. I'm struggling to identify the element that the user is selecting. I have the following:
In my view:
private void source_CurrentChanged(object sender, EventArgs e)
{
_presenter.ElementChanged(sender, e);
}
In my presenter:
public void ElementChanged(object sender, EventArgs e)
{
BindingSource source = (BindingSource)sender;
// Here I need to get the ID of the selected element in the source.Current property.
// HOW?
}
This seems to work ok - and I can see when debugging that source.Current contains the data:
? source.Current
{ BodyId = 1, IsInUse = true, IsValid = true, CreateDate = {04/07/2006 09:31:59}, LastUpdateDate = {04/07/2006 09:31:59}, StatusDescShort = "Exist" ... }
BodyId: 1
CreateDate: {04/07/2006 09:31:59}
IsInUse: true
IsValid: true
LastUpdateDate: {04/07/2006 09:31:59}
StatusDescShort: "Exist"
but I am at a loss as how I might access the value of BodyId. I've a feeling I'm missing something really obvious here (not the first time).
I'm surprised you're not using something like IQueryable<MyType>.
Because then it would be a simple matter of casting: source.Current as MYType
And maybe eliminate an in-between DataRowView