Create user control can be reuse on another form
File Browse user control function list:
- Support choose file using OpenFileDialog
- Support save pervious selected file path to INI file
- Support custom Filter
- Add event ChoosedFile fire after file choosed
- Handle event keypress on TextBox file path
Build and view on Toolbox to choose user control display
Drag to Form to use
Config some custom property and event:
- Filter property
- DefaultPath property
- ChoosedFile event
- SectionStoreFile
- SectionStoreKey
Code:
namespace ReadResourceFile.UserControls
{
public partial class ucOpenFile : UserControl
{
private const string _iniFile = "/Setting.ini";
[Description("Default file path"), DefaultValue("")]
public string DefaultPath
{
get
{
return txtFullPath.Text;
}
set
{
txtFullPath.Text = value;
}
}
private string _sectionStoreFile;
[DefaultValue("")]
public string SectionStoreFile
{
get { return _sectionStoreFile; }
set { _sectionStoreFile = value; }
}
private string _sectionStoreKey = "FilePath";
[DefaultValue("FilePath")]
public string SectionStoreKey
{
get { return _sectionStoreKey; }
set
{
if (string.IsNullOrWhiteSpace(value))
value = "FilePath";
_sectionStoreKey = value;
}
}
public ucOpenFile()
{
InitializeComponent();
}
public event EventHandler<string> ChoosedFile;
public void OnChoosedFile(object sender, string arg)
{
if (ChoosedFile != null)
ChoosedFile(sender, arg);
if (!string.IsNullOrWhiteSpace(SectionStoreFile))
IniWriter.IniWrite(Environment.CurrentDirectory + _iniFile, SectionStoreFile, SectionStoreKey, arg);
}
private void btnBrowse_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
if (!string.IsNullOrWhiteSpace(txtFullPath.Text))
{
if (File.Exists(txtFullPath.Text))
dlg.InitialDirectory = Path.GetDirectoryName(txtFullPath.Text);
else if (Directory.Exists(txtFullPath.Text))
dlg.InitialDirectory = txtFullPath.Text;
else
dlg.InitialDirectory = Path.GetPathRoot(txtFullPath.Text);
}
dlg.Filter = Filter;
if (dlg.ShowDialog() == DialogResult.OK)
{
txtFullPath.Text = dlg.FileName;
OnChoosedFile(txtFullPath, dlg.FileName);
}
}
[Description("Filter file type"), DefaultValue("")]
public string Filter { get; set; }
private void txtFullPath_KeyPress(object sender, KeyPressEventArgs e)
{
string path = txtFullPath.Text.Trim();
if (IsValidPath(path))
{
string extension = Path.GetExtension(path).ToLower();
if (e.KeyChar == (char)13 && File.Exists(path) && (Array.IndexOf(ArrType, ".*") >= 0 || Array.IndexOf(ArrType, extension) >= 0))
{
OnChoosedFile(txtFullPath, path);
}
}
}
private bool IsValidPath(string path)
{
if (path.Length < 3)
return false;
Regex driveCheck = new Regex(@"^[a-zA-Z]:\\$");
if (!driveCheck.IsMatch(path.Substring(0, 3))) return false;
string strTheseAreInvalidFileNameChars = new string(Path.GetInvalidPathChars());
strTheseAreInvalidFileNameChars += @":/?*" + "\"";
Regex containsABadCharacter = new Regex("[" + Regex.Escape(strTheseAreInvalidFileNameChars) + "]");
if (containsABadCharacter.IsMatch(path.Substring(3, path.Length - 3)))
return false;
return true;
}
public string[] ArrType
{
get
{
if (string.IsNullOrWhiteSpace(Filter))
return new string[0];
string[] arr = Filter.Split('|');
string[] output = new string[arr.Length / 2];
if (arr.Length > 1)
for (int i = arr.Length - 1; i >= 0; i -= 2)
{
if (i % 2 != 0)
output[i / 2] = arr[i].Trim().Substring(1).ToLower();
}
return output;
}
}
private void ucOpenFile_Load(object sender, EventArgs e)
{
if (!string.IsNullOrWhiteSpace(SectionStoreFile))
{
string filePath = IniWriter.IniRead(Environment.CurrentDirectory + _iniFile, this.SectionStoreFile, SectionStoreKey);
if (!string.IsNullOrWhiteSpace(filePath))
this.DefaultPath = filePath;
}
}
}
//IniWriterFile
namespace ReadResourceFile.Code
{
public class IniWriter
{
[DllImport("kernel32")]
static extern long WritePrivateProfileString(string section, string key,
string val, string filePath);
[DllImport("kernel32")]
static extern int GetPrivateProfileString(string section, string key,
string def, StringBuilder retVal, int size, string filePath);
public static string IniRead(string strFilePath, string strSection, string strKey)
{
var RetVal = new StringBuilder(255);
GetPrivateProfileString(strSection, strKey, string.Empty, RetVal, 255, strFilePath);
return RetVal.ToString();
}
public static void IniWrite(string strFilePath, string strSection, string strKey, string strValue)
{
WritePrivateProfileString(strSection, strKey, strValue, strFilePath);
}
public static void IniDeleteKey(string strFilePath, string strSection, string strKey)
{
IniWrite(strFilePath, strSection, strKey, null);
}
public static void IniDeleteSection(string strFilePath, string strSection)
{
IniWrite(strFilePath, strSection, null, null);
}
public static bool KeyExists(string strFilePath, string strSection, string strKey)
{
return !string.IsNullOrEmpty(IniRead(strFilePath, strSection, strKey));
}
}
