我有这个程序必须记住用户上次关闭时的位置。我选择使用注册表尝试此操作，但我不知道如何将从registry.read获取的值转换为int，因此我可以将其设置为表单的位置。
以下是我对此的看法：
ModifyRegistry myRegistry = new ModifyRegistry(); (< this is a field variable)
private void RobCsvKopieren_Load(object sender, EventArgs e)
{
Location.X = ((int)myRegistry.Read("Location.X"));
}
private void RobCsvKopieren_LocationChanged(object sender, EventArgs e)
{
}
private void RobCsvKopieren_FormClosing(object sender, FormClosingEventArgs e)
{
myRegistry.Write("Location.X", Location.X);
myRegistry.Write("Location.Y", Location.Y);
myRegistry.Write("Size", Size);
}
PS：我对注册表的体验绝对是0，注册表修改的代码来自我在本网站上多次发现的网站。
PPS。这里是修改注册表类的代码（你可能会注意到我没有改变它，因为我害怕打破它。：
/* ***************************************
* ModifyRegistry.cs
* ---------------------------------------
* a very simple class
* to read, write, delete and count
* registry values with C#
* ---------------------------------------
* if you improve this code
* please email me your improvement!
* ---------------------------------------
* by Francesco Natali
* - fn.varie@libero.it -
* ***************************************/
using System;
// it's required for reading/writing into the registry:
using Microsoft.Win32;
// and for the MessageBox function:
using System.Windows.Forms;
namespace Utility.ModifyRegistry
{
/// <summary>
/// An useful class to read/write/delete/count registry keys
/// </summary>
public class ModifyRegistry
{
private bool showError = false;
/// <summary>
/// A property to show or hide error messages
/// (default = false)
/// </summary>
public bool ShowError
{
get { return showError; }
set { showError = value; }
}
private string subKey = "SOFTWARE\\" + Application.ProductName.ToUpper();
/// <summary>
/// A property to set the SubKey value
/// (default = "SOFTWARE\\" + Application.ProductName.ToUpper())
/// </summary>
public string SubKey
{
get { return subKey; }
set { subKey = value; }
}
private RegistryKey baseRegistryKey = Registry.LocalMachine;
/// <summary>
/// A property to set the BaseRegistryKey value.
/// (default = Registry.LocalMachine)
/// </summary>
public RegistryKey BaseRegistryKey
{
get { return baseRegistryKey; }
set { baseRegistryKey = value; }
}
/* **************************************************************************
* **************************************************************************/
/// <summary>
/// To read a registry key.
/// input: KeyName (string)
/// output: value (string)
/// </summary>
public string Read(string KeyName)
{
// Opening the registry key
RegistryKey rk = baseRegistryKey;
// Open a subKey as read-only
RegistryKey sk1 = rk.OpenSubKey(subKey);
// If the RegistrySubKey doesn't exist -> (null)
if (sk1 == null)
{
return null;
}
else
{
try
{
// If the RegistryKey exists I get its value
// or null is returned.
return (string)sk1.GetValue(KeyName.ToUpper());
}
catch (Exception e)
{
// AAAAAAAAAAARGH, an error!
ShowErrorMessage(e, "Reading registry " + KeyName.ToUpper());
return null;
}
}
}
/* **************************************************************************
* **************************************************************************/
/// <summary>
/// To write into a registry key.
/// input: KeyName (string) , Value (object)
/// output: true or false
/// </summary>
public bool Write(string KeyName, object Value)
{
try
{
// Setting
RegistryKey rk = baseRegistryKey;
// I have to use CreateSubKey
// (create or open it if already exits),
// 'cause OpenSubKey open a subKey as read-only
RegistryKey sk1 = rk.CreateSubKey(subKey);
// Save the value
sk1.SetValue(KeyName.ToUpper(), Value);
return true;
}
catch (Exception e)
{
// AAAAAAAAAAARGH, an error!
ShowErrorMessage(e, "Writing registry " + KeyName.ToUpper());
return false;
}
}
/* **************************************************************************
* **************************************************************************/
/// <summary>
/// To delete a registry key.
/// input: KeyName (string)
/// output: true or false
/// </summary>
public bool DeleteKey(string KeyName)
{
try
{
// Setting
RegistryKey rk = baseRegistryKey;
RegistryKey sk1 = rk.CreateSubKey(subKey);
// If the RegistrySubKey doesn't exists -> (true)
if (sk1 == null)
return true;
else
sk1.DeleteValue(KeyName);
return true;
}
catch (Exception e)
{
// AAAAAAAAAAARGH, an error!
ShowErrorMessage(e, "Deleting SubKey " + subKey);
return false;
}
}
/* **************************************************************************
* **************************************************************************/
/// <summary>
/// To delete a sub key and any child.
/// input: void
/// output: true or false
/// </summary>
public bool DeleteSubKeyTree()
{
try
{
// Setting
RegistryKey rk = baseRegistryKey;
RegistryKey sk1 = rk.OpenSubKey(subKey);
// If the RegistryKey exists, I delete it
if (sk1 != null)
rk.DeleteSubKeyTree(subKey);
return true;
}
catch (Exception e)
{
// AAAAAAAAAAARGH, an error!
ShowErrorMessage(e, "Deleting SubKey " + subKey);
return false;
}
}
/* **************************************************************************
* **************************************************************************/
/// <summary>
/// Retrive the count of subkeys at the current key.
/// input: void
/// output: number of subkeys
/// </summary>
public int SubKeyCount()
{
try
{
// Setting
RegistryKey rk = baseRegistryKey;
RegistryKey sk1 = rk.OpenSubKey(subKey);
// If the RegistryKey exists...
if (sk1 != null)
return sk1.SubKeyCount;
else
return 0;
}
catch (Exception e)
{
// AAAAAAAAAAARGH, an error!
ShowErrorMessage(e, "Retriving subkeys of " + subKey);
return 0;
}
}
/* **************************************************************************
* **************************************************************************/
/// <summary>
/// Retrive the count of values in the key.
/// input: void
/// output: number of keys
/// </summary>
public int ValueCount()
{
try
{
// Setting
RegistryKey rk = baseRegistryKey;
RegistryKey sk1 = rk.OpenSubKey(subKey);
// If the RegistryKey exists...
if (sk1 != null)
return sk1.ValueCount;
else
return 0;
}
catch (Exception e)
{
// AAAAAAAAAAARGH, an error!
ShowErrorMessage(e, "Retriving keys of " + subKey);
return 0;
}
}
/* **************************************************************************
* **************************************************************************/
private void ShowErrorMessage(Exception e, string Title)
{
if (showError == true)
MessageBox.Show(e.Message,
Title
, MessageBoxButtons.OK
, MessageBoxIcon.Error);
}
}
}
答案 0 :(得分：3)
这只是转换到Int的问题吗？ 如果是，您应该使用：
Location.X = Convert.ToInt32(myRegistry.Read("Location.X"));
注意： 如果它不是int值，您将获得FormatException以避免它可以使用：
int locationX;
var success = Int32.TryParse(myRegistry.Read("Location.X"), out locationX);
if(success)
Location.X = locationX;
else
Location.X = // your DefaultValue
答案 1 :(得分：1)
在Paulie Waulie的帮助下修复了评论：
“您可以使用自定义类型，而不是使用注册表吗？您可以使用自定义类型，以便将指标存储在自定义类型中并将其存储在那里：msdn.microsoft.com/en-us/library /bb397750.aspx“
我为它创建了设置。并通过填写FormClosing事件的设置来完成它。
private void RobCsvKopieren_FormClosing(object sender, FormClosingEventArgs e)
{
Properties.Settings.Default.f_sOudeLocatie = f_sOudeLocatie;
Properties.Settings.Default.f_sNieuweLocatie = f_sNieuweLocatie;
Properties.Settings.Default.LastFormLocation = this.Location;
Properties.Settings.Default.LastFormSize = this.Size;
myRegistry.Write("Size", Size);
Properties.Settings.Default.Save();
}
并指定他们到
上的this.location private void RobCsvKopieren_Load(object sender, EventArgs e)
{
if (Properties.Settings.Default.f_sOudeLocatie != "")
{
fdlg.InitialDirectory = f_sOudeLocatie;
}else
{
fdlg.InitialDirectory = Properties.Settings.Default.f_sOudeLocatie;
}
this.Location = Properties.Settings.Default.LastFormLocation;
this.Size = Properties.Settings.Default.LastFormSize;
}
特别感谢Paulie Waulie