So what my problem is and i have looked on the internet for this but really cannot find out how to do it.
I want to use my combo box which is populated with items from a notepad. i want the combo box to search through the notepad when an items from the combo box is selected and when it gets a match i want it to return the line number(ID).
This is what i thought would work, but it doesn't full work.
int items = File.ReadLines(#"C:\Users\PC\Documents\File\IDs.txt").Count();
string line;
int thisnum;
if (cboItemPick.SelectedIndex != -1)
{
if (cboItemPick.SelectedItem != null)
{
for (int i = 0; i <items;)
{
items = i;
line = File.ReadLines(#"C:\Users\PC\Documents\File\IDs.txt").ElementAt(items);
if (line == cboItemPick.Text)
{
MessageBox.Show("Boom");
break;
}
else
{
i++;
}
}
}
}
First of all, your code will have very bad performances. Please refer to this reviewed example:
if( cboItemPick.SelectedItem != null) {
var filepath = #"C:\Users\PC\Documents\File\IDs.txt";
var lines = File.ReadLines(filepath);
var keyword = cboItemPIck.SelectedItem as String;
for(var i = 0; i < lines.length; i++) {
var line = lines[i];
if( string.Compare(line, keyword) == 0) {
// Good, you have a match!
MessageBox.Show(string.Format("Item found at line: {0}", i));
break;
}
}
}
I hope this can help you.
You can try this:
var lines = File.ReadLines(#"C:\Users\PC\Documents\File\IDs.txt");
var result = lines.Select((i, index) => new { Value = i, Index = index }).ToList();
//Check if cboItemPick.SelectedItem is valid and set it to comboboxValue
var lineNumber = result.First(i => i.Value == comboboxValue).Select(i => i.Index);
I'm trying to automate testing of excel add-in that allows you to create some analysis entities based on pivot table definition.
I'm able to create random pivot table using cubefield objects(I'm adding random fields to rows,columns, and measures) but I need also to add some filtering and here I'm stuck.
Is there any way to get cubefield item list ? For example when I have date field in filter
list of all days and then I want to select some random days for filtering.
This is my code maybe it's not elegant but it works for my purpose.
I'm basically grabbing cubefields check if it's measure or dimension and then I'm setting
it's orientation.
public void PivotTableFieldList()
{
_currentPivotTable = (Excel.PivotTable) _worksheet.PivotTables("PivotTable1");
_currentPivotTable.ManualUpdate = true;
List<Excel.CubeField> measureList = new List<Excel.CubeField>();
List<Excel.CubeField> dimensionList = new List<Excel.CubeField>();
foreach (Excel.CubeField field in _currentPivotTable.CubeFields)
{
if (field.CubeFieldType == Excel.XlCubeFieldType.xlMeasure && field.ShowInFieldList)
{
measureList.Add(field);
}
}
foreach (Excel.CubeField field in _currentPivotTable.CubeFields)
{
if (field.CubeFieldType != Excel.XlCubeFieldType.xlMeasure && field.ShowInFieldList)
{
dimensionList.Add(field);
}
}
Random dimRan=new Random();
dimRan.Next(0, dimensionList.Count);
Random mesRan = new Random();
mesRan.Next(0, measureList.Count);
dimensionList.ToArray();
measureList.ToArray();
Excel.CubeField[] measureRandomList= new Excel.CubeField[3];
Excel.CubeField[] dimensionRandomList = new Excel.CubeField[6];
for (int i = 0; i < 3; i++)
{
measureRandomList[i] = measureList[mesRan.Next(1, measureList.Count)];
}
for (int i = 0; i < 6; i++)
{
dimensionRandomList[i] = dimensionList[dimRan.Next(i, dimensionList.Count)];
}
for (int i = 0; i < 3; i++)
{
var field = measureRandomList[i];
var name = measureRandomList[i].Name;
field.Orientation= Excel.XlPivotFieldOrientation.xlDataField;
}
dimensionRandomList[0].Orientation= Excel.XlPivotFieldOrientation.xlRowField;
dimensionRandomList[1].Orientation = Excel.XlPivotFieldOrientation.xlColumnField;
dimensionRandomList[2].Orientation = Excel.XlPivotFieldOrientation.xlPageField;
dimensionRandomList[2].EnableMultiplePageItems=true;
//How can I get cubefield items list ?
}
You can filter your fields like this:
yourPivotField.CurrentPageName = string.Format("[{0}].[{1}].&[{2}]", SheetName, FieldName, FieldValue);
This sets the filter of your pivot table
Not sure if it it this you were searching for.
I'm curious as to the best route (more looking towards simplicity, not speed or efficiency) to sort a DropDownList in C#/ASP.NET - I've looked at a few recommendations but they aren't clicking well with me. this drop down is giving me list in alphabetical order. But I have to sort out randomly.
Note:I do not have control over how the data comes into the DropDownList - I cannot modify the SQL.
public void populateLocationList()
{
DataTable dt_locations = (DataTable)daa_addresses.GetDataByEventLocations(int_eventid);
if (dt_locations != null && dt_locations.Rows.Count > 0)
{
// Populate locations dropdown menu
// Bind locationsList instead of dt_locations
ddl_locations.DataTextField = "Key";
ddl_locations.DataValueField = "Value";
ddl_locations.DataSource = RemoveDuplicateLocations(dt_locations);
ddl_locations.DataBind();
string location = "";
// Set the selection based upon the query string
if (Request.QueryString["loc"] != null)
{
location = Request.QueryString["loc"];
locationLbl.Text = Request.QueryString["loc"];
locationID.Value = "-1";
}
if (dt_locations.Rows.Count == 1)
{
location = ddl_locations.Items[0].Text;
locationLbl.Text = location;
}
// Set location in drop down list
int int_foundlocation = 0;
bool foundLocation = false;
foreach (ListItem lsi_item in ddl_locations.Items)
{
if (lsi_item.Text.ToLower().Trim() == location.ToLower().Trim())
{
int_foundlocation = ddl_locations.Items.IndexOf(lsi_item);
foundLocation = true;
break;
}
}
ddl_locations.SelectedIndex = int_foundlocation;
if (ddl_locations.Items.Count == 1)
{
// Make location label visible.
locationLbl.Visible = true;
ddl_locations.Visible = false;
}
else
{
locationLbl.Visible = false;
ddl_locations.Visible = true;
}
//* defualt location S for short courses *//
if (!IsPostBack && !foundLocation)
{
ListItem s = ddl_locations.Items.FindByText("S");
int index = 0;
if (s != null)
{
index = ddl_locations.Items.IndexOf(s);
}
ddl_locations.SelectedIndex = index;
ddl_locations.DataBind();
}
}
}
I have to sort out randomly.
You'd have to shuffle rows, probably with something close to this code (borrowed from #configurator's answer):
internal static class Extensions
{
internal static IEnumerable<T> Shuffle<T>(this IEnumerable<T> source, Random rng)
{
T[] elements = source.ToArray();
// Note i > 0 to avoid final pointless iteration
for (int i = elements.Length - 1; i > 0; i--)
{
// Swap element "i" with a random earlier element it (or itself)
int swapIndex = rng.Next(i + 1);
yield return elements[swapIndex];
elements[swapIndex] = elements[i];
// we don't actually perform the swap, we can forget about the
// swapped element because we already returned it.
}
// there is one item remaining that was not returned - we return it now
yield return elements[0];
}
}
Assuming that RemoveDuplicateLocations returns a DataTable the binding part of your code should be changed to:
ddl_locations.DataSource = RemoveDuplicateLocations(dt_locations)
.AsEnumerable()
.Shuffle(new Random())
.CopyToDataTable();
I have one xtragrid control on my devxpress form . I've created the columns of my grid at runtime when i load the form . I'm developing the Field chooser for my grid view which is situated on the same form. For that i used the repositoryItemCheckedComboBoxEditcontrol & in that control i added the column names which will be present in the xtragrid.
Basically i created the columns to the xtragrid with the Visible property to false. When user checks particular column name by using repositoryItemCheckedComboBoxEdit then i set the Visible to true & again if user unchecked the column name then again i set the visible to false. & while creating column i set the width of the column.
Problem which i'm facing is that if user select the all fields from the repositoryItemCheckedComboBoxEdit then the grid control should show the horizontal scroll bar automatically when require.
And another problem is that with the columns is besides setting the width of the column, it is not showing the required width of that column . it shrinks that all column width .
code which i use for creating column to the xtragridview at run time is as follows -
public void AddGridColumn(string fieldName, string caption, int nRowWidth, RepositoryItem Item, object oCollection, string DisplayMember, string ValueMember, string format, FormatType type)
{
DevExpress.XtraGrid.Columns.GridColumn column = ColumnView.Columns.AddField(fieldName);
column.Caption = caption;
column.ColumnEdit = Item;
column.DisplayFormat.FormatType = type;
column.DisplayFormat.FormatString = format;
column.VisibleIndex = ColumnView.VisibleColumns.Count;
column.Width = nRowWidth;
}
code for the field chooser is as follows -
I used this function for filling the items of the repositoryItemCheckedComboBoxEdit control
private void FieldCollection()
{
allFields = new ArrayList();
columnNames = new Dictionary<string, string>();
allFields.Clear();
repositoryItemCheckedComboBoxEdit1.Items.Clear();
for (int i = 0; i < gvBase.Columns.Count; i++)
{
allFields.Add(gvBase.Columns[i].Caption );
if (gvBase.Columns[i].FieldName != "ContactID")
{
if (gvBase.Columns[i].Visible == true)
{
if (gvBase.Columns[i].Caption != "Label1" && gvBase.Columns[i].Caption != "Label2" && gvBase.Columns[i].Caption != "Label3" && gvBase.Columns[i].Caption != "Label4" && gvBase.Columns[i].Caption != "Label5")
repositoryItemCheckedComboBoxEdit1.Items.Add(gvBase.Columns[i].Caption, CheckState.Checked);
if (!columnNames.ContainsKey(gvBase.Columns[i].Caption))
columnNames.Add(gvBase.Columns[i].Caption, gvBase.Columns[i].FieldName);
}
else
{
if (gvBase.Columns[i].Caption != "Label1" && gvBase.Columns[i].Caption != "Label2" && gvBase.Columns[i].Caption != "Label3" && gvBase.Columns[i].Caption != "Label4" && gvBase.Columns[i].Caption != "Label5")
repositoryItemCheckedComboBoxEdit1.Items.Add(gvBase.Columns[i].Caption, CheckState.Unchecked);
if (!columnNames.ContainsKey(gvBase.Columns[i].FieldName))
columnNames.Add(gvBase.Columns[i].Caption, gvBase.Columns[i].FieldName);
}
}
}
cmbFieldChooser.EditValue = "";
}
this is used for the repositoryItemCheckedComboBoxEdit control event -
private void cmbFieldChooser_EditValueChanged(object sender, EventArgs e)
{
ArrayList temp = new ArrayList();
temp.AddRange(allFields);
string[] strFields = cmbFieldChooser.EditValue.ToString().Split(',');
for (int i = 0; i < strFields.Length; i++)
{
if (temp.Contains(strFields[i].Trim()))
temp.Remove(strFields[i].Trim());
if (strFields[i] != "")
{
if (columnNames.ContainsKey(strFields[i].Trim()))
{
if (gvBase.Columns[columnNames[strFields[i].Trim()]].Visible == false)
{
gvBase.Columns[columnNames[strFields[i].Trim()]].Visible = true;
gvBase.Columns[columnNames[strFields[i].Trim()]].BestFit();
}
}
}
}
if (temp.Count < 20)
{
for (int j = 0; j < temp.Count; j++)
{
if (columnNames.ContainsKey(temp[j].ToString().Trim()))
{
gvBase.Columns[columnNames[temp[j].ToString().Trim()]].Visible = false;
}
}
}
cmbFieldChooser.EditValue = repositoryItemCheckedComboBoxEdit1.GetCheckedItems();
if ((cmbFieldChooser.EditValue.ToString()).Split(',').Length > 5)
{
gvBase.OptionsView.ColumnAutoWidth = false;
gvBase.BestFitColumns();
gvBase.HorzScrollVisibility = ScrollVisibility.Always;
}
else
{
gvBase.OptionsView.ColumnAutoWidth = true;
gvBase.HorzScrollVisibility = ScrollVisibility.Never;
}
}
How to resolve this problem?
thanks.
How many columns do you have in your Grid?
I see you have code there to turn off the ColumnAutoWidth once you go past 5 columns (ie 6 columns or more). Have you debugged this condition to ensure the ColumnAutoWidth is indeed being turned off?
As per BestFitColumns Help Doc the BestFitColumns will only calculate for the first n rows as per the BestFitMaxRowCount property unless it it set to -1, could this be a cause?
The other thing that seems a little odd if that you are setting the EditValue of cmdFieldChooser within the cmdFieldChooser_EditValueChanged event... why so?
I have a CheckedListBox that has X number of items. These items are placed there at runtime. These items are supposed to represent reports that can be displayed in the DataGridView. What I need to do now is display the record count for each report in parenthesis right next to the report name. I tried, not for too long, to edit the actual name of the item but couldn't find out how to do it. So then, I brute forced it. Saved the items to an array, cleared the items, appended the record counts to each item in the array, created new items. Well, this has caused issues because now it's not retaining my checks and the reason why is because whenever I generate the reports, I clear the items and recreate them. Well, rather than doing another foreach loop to save the checked status, does anyone know of a way to change the text of existing items in a CheckedListBox?
Here is the code I currently have:
In the MainForm.Designer.cs:
this.clbReports.Items.AddRange(new object[] {
"Report 1",
"Report 2",
"Report 3",
"Report 4",
"Report 5",
"Report 6",
"Report 7",
"Report 8",
"Report 9",
"Report 10",
"Report 11"});
And it looks like:
And I want it to look like (but there won't all be 0's):
Here is the SelectedIndexChanged function:
private void clbReports_SelectedIndexChanged(object sender, EventArgs e)
{
string strCheckBox = clbReports.SelectedItem.ToString();
bool bShowAllIsChecked = clbReports.GetItemChecked(clbReports.FindString("Show All Error Reports"));
bool bSelected = clbReports.GetItemChecked(clbReports.FindString(strCheckBox));
int nIndex = -1;
if (strCheckBox.Contains("Show All Error Reports"))
{
foreach (string str in _strReports)
{
if (!str.Contains("Show All Error Reports") && !str.Contains("Show Tagged Records"))
{
nIndex = clbReports.FindString(str);
if (nIndex > -1)
{
clbReports.SetItemChecked(nIndex, bSelected);
}
}
}
}
else
{
if (strCheckBox.Contains("Show All Error Reports") || bShowAllIsChecked)
{
foreach (string str in _strReports)
{
nIndex = clbReports.FindString(str);
if (nIndex > -1)
{
clbReports.SetItemChecked(nIndex, false);
}
}
}
nIndex = clbReports.FindString(strCheckBox);
if (nIndex > -1)
{
clbReports.SetItemChecked(nIndex, bShowAllIsChecked ? true : bSelected);
}
}
string[] strCheckedItems = new string[clbReports.CheckedItems.Count];
clbReports.CheckedItems.CopyTo(strCheckedItems, 0);
List<string> checkBoxReportFilter = new List<string>();
foreach (ReportRecord obj in this._lstReportRecords)
{
foreach (string str in strCheckedItems)
{
if (str.Contains(obj.Description))
{
checkBoxReportFilter.Add(obj.PartID.ToString());
}
}
}
try
{
if (checkBoxReportFilter.Count == 0 && clbReports.CheckedItems.Count > 0)
{
throw new NullReferenceException();
}
_strReportFilter = String.Join(",", checkBoxReportFilter.ToArray());
}
catch (NullReferenceException)
{
_strReportFilter = "-1";
}
generateReport();
}
And here is the code where I am clearing the items, getting the report counts and creating the new items.
_lstReportRecords = _dataController.ReportList;
bool[] bChecked = new bool[clbReports.Items.Count];
int nCounter = 0;
foreach (string str in _strReports)
{
foreach (string str2 in clbReports.SelectedItems)
{
bChecked[nCounter] = str2.Contains(str);
}
nCounter++;
}
clbReports.Items.Clear();
nCounter = 0;
foreach (string str in _strReports)
{
int nCount = _lstReportRecords.Where<ReportRecord>(delegate(ReportRecord rr) {
return rr.Description == str;
}).Count();
string newReport = str + " (" + nCount + ")";
clbReports.Items.Add(newReport);
clbReports.SetItemChecked(nCounter, bChecked[nCounter]);
nCounter++;
}
Please tell me there is an easier way to do this. I tried doing foreach loops through the clbReports.Items but it wants me to cast it to a string (errored on me when trying to cast to a CheckBox) so I couldn't change the value. And even if I could cast it to a CheckBox, I have a feeling it will give me the error that Enumeration has failed because the list has been changed (or however they word it). Any and all help is welcome. Thanks.
Edit: Please know that the Report X are just so that the actual report names aren't displayed to keep it generic. However, in the code, I just copied and pasted so the Show All Error Reports and Show All Tagged Records are reports I need to check.
The right ( == most simple and most direct) answer and solution is:
this.clbReports.Items[nIndex] = "new text of the item"
yes, those items are of type "object". No, nobody minds that, string is an object too ;)
If I were you, I'd try to give the INotifyPropertyChanged Interface a go.
You Shouldn't mess with events unless necessary. this will mean you can't use the designer to create the items, but as far as I've understood, it's a runtime-modified list anyway...
In detail:
• Create A Class (e.g.'Foo') that Implements INotifyPropertyChanged (Basically this will tell any listener that the text property has changed). This class will hold the names of all entries.
• create an ObservableCollection and bind your CheckedListBox to that Collection. In WinForms you will have to create a DataBindingSource and plug your Collection to one end and the ComboBox to the other end.
• Any change made to the collection will be visible in the control.
HTH
Sebi
In order to change the items in a ListBox (or a CheckedListBox), you should change these items' ToString() result.
The easiest solution would be to create a "Holder" class, which has a reference to the report it represents. Then the Holder class' ToString() method should be something like this:
public override string ToString()
{
return String.Format("{0} ({1})", BaseStr, MyReport.RecordCount);
}
If you change MyReport.RecordCount somehow (because a report's record count changes), you can just call clbReports.Refresh(), and it'll automatically show the new value.
I think this way you don't even need the temporary array solution in the second code block; however, I'd like to suggest an alternative way of getting the item's checked state.
You can iterate through the clbReports.CheckedIndices, and fill your bChecked array with true values only for indices in that array.
Well, due to time constraints I tried something else. I went with a ListView where CheckBoxes = true and View = List. I also removed Show All Error Reports and Show Tagged Records to checkboxes outside of the list. This made it a lot easier to do the functions I wanted. Here is the new code.
MainForm.Designer.cs
//
// cbTaggedRecords
//
this.cbTaggedRecords.AutoSize = true;
this.cbTaggedRecords.Location = new System.Drawing.Point(151, 9);
this.cbTaggedRecords.Name = "cbTaggedRecords";
this.cbTaggedRecords.Size = new System.Drawing.Size(106, 17);
this.cbTaggedRecords.TabIndex = 3;
this.cbTaggedRecords.Text = "Tagged Records";
this.cbTaggedRecords.UseVisualStyleBackColor = true;
this.cbTaggedRecords.CheckedChanged += new System.EventHandler(this.ShowTaggedRecords_CheckChanged);
//
// cbAllErrorReports
//
this.cbAllErrorReports.AutoSize = true;
this.cbAllErrorReports.Location = new System.Drawing.Point(6, 9);
this.cbAllErrorReports.Name = "cbAllErrorReports";
this.cbAllErrorReports.Size = new System.Drawing.Size(102, 17);
this.cbAllErrorReports.TabIndex = 2;
this.cbAllErrorReports.Text = "All Error Reports";
this.cbAllErrorReports.UseVisualStyleBackColor = true;
this.cbAllErrorReports.CheckedChanged += new System.EventHandler(this.ShowAllErrorReports_CheckChanged);
//
// listView1
//
this.listView1.CheckBoxes = true;
listViewItem1.StateImageIndex = 0;
listViewItem2.StateImageIndex = 0;
listViewItem3.StateImageIndex = 0;
listViewItem4.StateImageIndex = 0;
listViewItem5.StateImageIndex = 0;
listViewItem6.StateImageIndex = 0;
listViewItem7.StateImageIndex = 0;
listViewItem8.StateImageIndex = 0;
listViewItem9.StateImageIndex = 0;
this.listView1.Items.AddRange(new System.Windows.Forms.ListViewItem[] {
listViewItem1,
listViewItem2,
listViewItem3,
listViewItem4,
listViewItem5,
listViewItem6,
listViewItem7,
listViewItem8,
listViewItem9});
this.listView1.Location = new System.Drawing.Point(6, 29);
this.listView1.Name = "listView1";
this.listView1.Size = new System.Drawing.Size(281, 295);
this.listView1.TabIndex = 1;
this.listView1.UseCompatibleStateImageBehavior = false;
this.listView1.View = System.Windows.Forms.View.List;
this.listView1.ItemChecked += new System.Windows.Forms.ItemCheckedEventHandler(this.listView_ItemChecked);
MainForm.cs
private void listView_ItemChecked(object sender, ItemCheckedEventArgs e)
{
if (e != null)
{
int nLength = e.Item.Text.IndexOf("(") - 1;
string strReport = nLength <= 0 ? e.Item.Text : e.Item.Text.Substring(0, nLength);
if (e.Item.Checked)
{
_lstReportFilter.Add(strReport);
}
else
{
_lstReportFilter.Remove(strReport);
}
}
List<string> checkBoxReportFilter = new List<string>();
foreach (ReportRecord obj in this._lstReportRecords)
{
foreach (string str in _lstReportFilter)
{
if (str.ToLower().Contains(obj.Description.ToLower()))
{
checkBoxReportFilter.Add(obj.PartID.ToString());
}
}
}
try
{
if (checkBoxReportFilter.Count == 0 && listView1.CheckedItems.Count > 0)
{
throw new NullReferenceException();
}
_strReportFilter = String.Join(",", checkBoxReportFilter.ToArray());
}
catch (NullReferenceException)
{
_strReportFilter = "-1";
}
if (!bShowAll)
{
generateReport();
}
}
private void ShowAllErrorReports_CheckChanged(object sender, EventArgs e)
{
bShowAll = true;
foreach (ListViewItem lvi in listView1.Items)
{
lvi.Checked = ((CheckBox)sender).Checked;
}
_lstReportFilter.Clear();
bShowAll = false;
generateReport();
}
private void ShowTaggedRecords_CheckChanged(object sender, EventArgs e)
{
bool bChecked = ((CheckBox)sender).Checked;
if (bChecked)
{
if (!_lstReportFilter.Contains("Show Tagged Records"))
{
_lstReportFilter.Add("Show Tagged Records");
}
}
else
{
_lstReportFilter.Remove("Show Tagged Records");
}
listView_ItemChecked(null, null);
}
Code to add counts to CheckBoxes
_lstReportRecords = _dataController.ReportList;
int nTotalCount = 0;
foreach (ListViewItem lvi in listView1.Items)
{
int nCount = _lstReportRecords.Where(rr => lvi.Text.Contains(rr.Description)).Count();
nTotalCount += nCount;
lvi.Text = (lvi.Text.Contains("(") ? lvi.Text.Substring(0, lvi.Text.IndexOf("(") + 1) : lvi.Text + " (") + nCount.ToString() + ")";
}
cbAllErrorReports.Text = (cbAllErrorReports.Text.Contains("(") ? cbAllErrorReports.Text.Substring(0, cbAllErrorReports.Text.IndexOf("(") + 1) : cbAllErrorReports.Text + " (") + nTotalCount.ToString() + ")";
int nTaggedCount = _lstReportRecords.Where(rr => rr.Description.Contains("Tagged")).Count();
cbTaggedRecords.Text = (cbTaggedRecords.Text.Contains("(") ? cbTaggedRecords.Text.Substring(0, cbTaggedRecords.Text.IndexOf("(") + 1) : cbTaggedRecords.Text + " (") + nTaggedCount.ToString() + ")";
Thank you all for your help and ideas.