i am using custom auto source to the text box. But the problem is, when i am entering key , if the suggestion list is high then the textbox flickers before showing suggestion.
private void txtSearch_TextChanged(object sender, EventArgs e)
{
if (txtSearch.Text != "")
{
string templateSearchTxt = txtSearch.Text;
foreach (String template in templateName) // templateName contains list of string
{
if (template.ToUpper().StartsWith(templateSearchTxt.ToUpper()))
{
suggestion.Add(template);
}
}
}
}
I have declared following code on form load event
suggestion = new AutoCompleteStringCollection();
txtSearch.AutoCompleteCustomSource = suggestion;
txtSearch.AutoCompleteMode = AutoCompleteMode.Suggest;
txtSearch.AutoCompleteSource = AutoCompleteSource.CustomSource;
I will seriously encourage you to use a Combobox with its AutoCompleteMode set to Suggest and attach the autocomplete list to it (as its AutoCompleteSource). It'll performt way better than your textchanged event listener.
Related
I want to filter the items that I added to my Listview, using my textbox_TextChanged Can you please show me the Codes, I am using Visual Studio 2013. tia
e.g.
First I am adding a Destination/Regularfare/Discountedfare/Baggagefare to my ListView. and my problem is Searching I want to search the Destinations using a TextBox.
There are no Codes inside my TextBox Search. that one I need.
And here's my Codes for adding an item to my ListView.
public void add(String destination, String Regulare, String Discounted, String Baggage) {
String [] rows = { destination, Regulare, Discounted, Baggage};
ListViewItem item = new ListViewItem(rows);
listView1.Items.Add(item);
}
private void btnAdd_Click(object sender, EventArgs e) {
add(textBox1.Text, textBox2.Text, textBox3.Text, textBox4.Text);
textBox1.Text = "";
textBox2.Text = "0";
textBox3.Text = "0";
textBox4.Text = "0";
MessageBox.Show("Record Added!","Saved",MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
tbDestination.Focus();
}
Like the other posters were saying, we don't know what your tech stack is or what problem you're trying to solve. Have you tried binding your list to a data source? Let's say you have a text box and a submit button for filtering. The user enters "California" into the text box and presses submit. You'll have a click handler in the code behind that invokes a DataBind() on your list. The method for your data bind will get the value of the textbox/hidden field and use it to return a conditional data structure that is then used to populate your list. You could even have a clear button that resets the filtering using the same method.
But it's been 16 days now, so you've probably already solved the problem. What did you end up doing?
Hı , Try this two way
First :
private void searchBox_TextChanged(object sender, EventArgs e)
{
// Call FindItemWithText with the contents of the textbox.
ListViewItem foundItem =
textListView.FindItemWithText(searchBox.Text, false, 0, true);
if (foundItem != null)
{
textListView.TopItem = foundItem;
}
}
Second :
void yourListView_MouseDown(object sender, MouseEventArgs e)
{
// Find the an item above where the user clicked.
ListViewItem foundItem =
iconListView.FindNearestItem(SearchDirectionHint.Up, e.X, e.Y);
if (foundItem != null)
previousItemBox.Text = foundItem.Text;
else
previousItemBox.Text = "No item found";
}
I'm working on my dataGridView and I'm trying to make one of my cell to be auto Complete, but its not working.
C# code:
private void dataGridRequest_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
TextBox prodCode = e.Control as TextBox;
if (prodCode != null)
{
prodCode.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
prodCode.AutoCompleteCustomSource = itemList;
prodCode.AutoCompleteSource = AutoCompleteSource.CustomSource;
}
}
Check 2 things:
Check if itemList is empty
Disable the multiline option in the textbox (here MSDN mentions it doesn't work on multiline TextBox Controls)
Based on gender, I want to load certain criteria.
For example, if I type 0 in a textbox, I want to load Mr., Dr. , etc..
If I type 1, I want to load Ms, Mrs, Miss, Dr. etc...
How can I do so?
Gender is typed in a textbox, and I want the combo box to load what I specified above.
Thank you.
This is just Sudo code there must be typo or Syntax error but you need to do something as below :
List<string> strMale = new List<string>{"Mr.", "Dr. "};
List<string> strFMale = new List<string>{"Mrs.", "Miss"};
//make use of Textbox Change Event
public void Text1_TextChanged(object sender, EventArgs e)
{
Combo1.Items.Clear();
//Bind the values using the text box input value
if(Text1.Text=="0")
{
Combo1.DataSource = strMale ;
}
else if(Text1.Text=="1")
{
Combo1.DataSource = strFMale ;
}
Combo1.SelectedIndex = 0;
}
You have to handle event ValueChanged (the name of the event depends on platform you're working with) and depending on value typed change source of your combobox
Try the following Code Use can use comboBox.Items.Insert or comboBox.Items.Add for inserting new items into a combobox.
private void textBox2_TextChanged(object sender, EventArgs e)
{
if (textBox2.Text == "0")
{
if (comboBox1.Items.Count > 0)
comboBox1.Items.Clear();
comboBox1.Items.Insert(0,"Mr");
comboBox1.Items.Insert(1, "Dr");
}
else if (textBox2.Text == "1")
{
if (comboBox1.Items.Count > 0)
comboBox1.Items.Clear();
comboBox1.Items.Add("Ms");
comboBox1.Items.Add("Mrs");
comboBox1.Items.Add("Miss");
}
}
How do I create an Auto-complete ComboBox or TextBox that filters text based on a string?
For example: if I type an "a" in a TextBox, I only get to see all strings containing an "a".
If you mean show suggestions then it's a simple matter of changing a property when you have the TextBox selected in your IDE of choice:
The options shown in the picture allow you to change the rules for autocompleting text in the text box as well as the source for the suggestions. (Visual Studio 2010)
You can go to the following link to learn more about the TextBox control.
MSDN Text Box Control
Windows Forms's autocomplete implementation uses Shell's autocomplete object, which can only do a "BeginWith" match until Windows Vista.
If you can demand your users to upgrade to Windows Vista, you can use IAutoComplete2::SetOptions to specify ACO_NOPREFIXFILTERING. Otherwise I am afraid you need to write your own.
Here is how I auto-complete for a specific value in a comboDropDown box.
void comboBox_Leave(object sender, EventArgs e)
{
ComboBox cbo = (sender as ComboBox);
if (cbo.Text.Length > 0)
{
Int32 rowIndex = cbo.FindString(cbo.Text.Trim());
if (rowIndex != -1)
{
cbo.SelectedIndex = rowIndex;
}
else
{
cbo.SelectedIndex = -1;
}
}
else
{
cbo.SelectedIndex = -1;
}
}
This filters results based on user input. Optimizing for large lists, populating your own data and error handling left out for you to complete:
public partial class Form1 : Form
{
List<String> data;
ListView lst = new ListView();
TextBox txt = new TextBox();
public Form1()
{
InitializeComponent();
data = new List<string>("Lorem ipsum dolor sit amet consectetur adipiscing elit Suspendisse vel".Split());
}
private void Form1_Load(object sender, EventArgs e)
{
this.Controls.Add(txt);
lst.Top = 20;
txt.TextChanged += new EventHandler(txt_TextChanged);
lst.View = View.List;
this.Controls.Add(lst);
list_items("");
}
void txt_TextChanged(object sender, EventArgs e)
{
list_items(txt.Text);
}
void list_items(string filter)
{
lst.Items.Clear();
List<string> results = (from d in data where d.Contains(filter) select d).ToList();
foreach (string s in results)
{
lst.Items.Add(s);
}
}
}
To get the combobox to auto complete, set the AutoCompleteSource and AutoCompleteMode properties:
cbo.AutoCompleteSource = AutoCompleteSource.ListItems;
cbo.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
The ListItems source tells the combo to use it's items collection as the auto complete source.
I know this is an old topic but i tried so hard to find a solution for c# autocomplete filtering too and couldn't find any so i came up with my own simple and easy way so i'll just share it for those who may think it's useful and wanna use in their projects. It does not use the control's autocomplete features. What it does just simply get the text entered from the combobox, search it in the source then display only the matching ones from the source as the combobox' new source. I implemented it in the combobox' KeyUp event.
Let's say (actually this is what i do for almost all the cases when i want autocompleting) we have a globally assigned DataTable called dt_source to be the combobox' source and it has two columns: id(int) and name(string).
DataTable dt_source = new DataTable("table");
dt_source.Columns.Add("id", typeof(int));
dt_source.Columns.Add("name", typeof(string));
And this is what my KeyUp method looks like:
private void cmb_box_KeyUp(object sender, KeyEventArgs e)
{
string srch = cmb_box.Text;
string srch_str = "ABackCDeleteEFGHIJKLMNOPQRSpaceTUVWXYZD1D2D3D4D5D6D7D8D9D0";
if (srch_str.IndexOf(e.KeyCode.ToString()) >= 0)
{
cmb_box.DisplayMember = "name"; // we want name list in the datatable to be shown
cmb_box.ValueMember = "id"; // we want id field in the datatable to be the value
DataView dv_source = new DataView(dt_source); // make a DataView from DataTable so ...
dv_source.RowFilter = "name LIKE '%"+ srch +"%'"; // ... we can filter it
cmb_box.DataSource = dv_source; // append this DataView as a new source to the combobox
/* The 3 lines below is the tricky part. If you repopulate a combobox, the first
item in it will be automatically selected so let's unselect it*/
cmb_box.SelectedIndex = -1; // unselection
/* Again when a combobox repopulated the text region will be reset but we have the
srch variable to rewrite what's written before */
cmb_box.Text = srch;
/* And since we're rewriting the text region let's make the cursor appear at the
end of the text - assuming 100 chars is enough*/
cmb_box.Select(100,0);
cmb_box.DroppedDown = true; // Showing the dropdownlist
}
}
I think your best bet is to override the OnKeyDown(KeyEventArgs e) event, and use the value to filter the ComboBox.AutoCompleteCustomSource. Then as noted above, change the AutoCompleteSource to AutoCompleteSource.ListItems.
I have a gridview to which I'm adding template fields programmatically. Each of the template fields have a textbox. I would like to make this text box have 2-way binding to a database column. Please see below code.
public class CustomEditItemTemplate : ITemplate
{
private DataControlRowType templateType;
private string columnName;
public CustomEditItemTemplate(DataControlRowType type, string colname)
{
this.templateType = type;
this.columnName = colname;
}
public void InstantiateIn(System.Web.UI.Control container)
{
TextBox tb = new TextBox();
tb.ID = columnName;
tb.DataBinding += new EventHandler(this.tb_DataBinding);
container.Controls.Add(tb);
}
private void tb_DataBinding(Object sender, EventArgs e)
{
TextBox t = (TextBox)sender;
DetailsView dv = (DetailsView)t.NamingContainer;
//This line does only one way binding. It takes the rows from the database and displays
//them in the textboxes. The other way binding is not done. This is why my code fails
t.Text = DataBinder.Eval(dv.DataItem, columnName).ToString();
}
}
I'm calling the above class as follows
tf = new TemplateField();
tf.HeaderText = "My First Names";
tf.EditItemTemplate = new CustomEditItemTemplate(DataControlRowType.DataRow, "firstName");
dvModify.Fields.Add(tf);
How can I make the text box such that when I edit the text, this change is reflected in the database as well?
Thanks for your time everyone
Perhaps you could changed the line t.Text = DataBinder.Eval(dv.DataItem, columnName).ToString(); to something like t.Text= string.Format("<%# Bind(\"{0}\") %>", columnName); ?
This is just a guess...
If that doesn't work, I found some articles that actually write new classes for handling two way databinding:
Article at CodeProject circa 2005
Article at Programmer's Heaven
Hopefully one of these options will be useful.
It's actually not too bad to do template fields programatically, after you've seen it once, of course. Here's how we do it, abridged:
TemplateField tf = new TemplateField();
//Do some config like headertext, style, etc;
tf.ItemTemplate = new CompiledTemplateBuilder(delegate(Control container)
{
//Add the regular row here, probably use a Label or Literal to show content
Label label = new Label();
lable.DataBinding += delegate(object sender, EventArgs e)
{
label.Text = ((MyDataType)DataBinder.GetDataItem(label.BindingContainer)).MyLabelDataField;
};
});
tf.EditItemTemplate = new CompiledBindableTemplateBuilder(delegate(Control container)
{
//Here we do the edit row. A CompiledBindableTemplateBuilder lets us bind in both directions
TextBox text = new TextBox();
text.DataBound += delegate(object sender, EventArgs e)
{
text.Text = ((MyDataType)DataBinder.GetDataItem(text.BindingContainer)).MyLabelDataField;
}
},
delegate(Control container)
{
OrderedDictionary dict = new OrderedDictionary();
dict["myLabelDataColumn"] = ((TextBox)container.FindControl(text.ID)).Text;
return dict;
});
So here's what's going on. We use CompiledBindableTemplateBuilder and CompiledTemplateBuilder to actually build our template field's contents. Using a delegate is just an easy way to set this up.
The key to answering your question is in the second argument to the CompiledBindableTemplateBuilder, which is a delegate establishing the binding. After an edit, during submit, the template field will call ExtractValuesFromCell and recover an IBindableTemplate, from which it will extract a Dictionary and then pull the value(s) out of it, adding them to it's own dictionary which eventually gets turned into the uploaded data. So that's why you return an OrderedDictionary from the Binding delegate. Hope that helps!