C＃如何将变量传递给另一个表单
我正在尝试添加一个搜索按钮，所以当我点击按钮时，它会打开另一个框，允许我输入我想要搜索的内容然后按搜索。 但我似乎无法从form2中的form1访问我的arraylist和我的DataStructure。 所以我想知道如何传递这些变量，以便我可以在我的form2中访问它们
#region Variables FootballClub PlayerMemberData = new FootballClub(0); ArrayList ClubData = new ArrayList(); public int CurrentPlayerShown = 0; // Path to the file for loading/saving. Note the '@' sign in front of the string. Without it all '\' have to be double '\\' string PlayerDetails = @"C:\Users\Clare\Desktop\Football_Player.txt"; #endregion #region DataStructure // ==============================The Data Structure===================================== [Serializable] private struct FootballClub { //the data types making up the struct public string Firstname; public string Surname; public int age; public string Address1; public string Address2; public string City; public string Country; public string Postcode; public int HomeNum; public int MobNum; public string Email; public string EmergencyName; public int EmergencyNum; public int MinutesPlayed; public int Goals; public int Penalties; public char CardGiven; public int TotalTime; public int TotalGoals; public int TotalPenalties; //the "constructor". Fills data structure with default vaules public FootballClub(int x) { Firstname = ""; Surname = ""; age = 0; Address1 = ""; Address2 = ""; City = ""; Country = ""; Postcode = ""; HomeNum = 0; MobNum = 0; Email = ""; EmergencyName = ""; EmergencyNum = 0; MinutesPlayed = 0; Goals = 0; Penalties = 0; CardGiven = ' '; TotalTime = 0; TotalGoals = 0; TotalPenalties = 0; } } // ==============================End of Data Structure===================================== #endregion #region MatchDetails private void NewMatch_Butt_Click(object sender, EventArgs e) { //create a new TabPage TabPage newTP = new TabPage(); //add it to the TabControl tabControl1.TabPages.Add(newTP); //set the title to 'Match'plus the tab number int TabPageNumber = tabControl1.SelectedIndex+1; //adds 1 from the current tab tabControl1.TabPages[TabPageNumber].Text = "Match " + (TabPageNumber+1); //make it the selected tab tabControl1.SelectTab(TabPageNumber); DeleteMatch_Butt.Enabled = true;// now that we have something to delete we can enable this button //make the new tab page the parent of the panel that holds all the controls TabPanel.Parent = tabControl1.SelectedTab; // } private void DeleteMatch_Butt_Click(object sender, EventArgs e) { // Removes the selected tab: tabControl1.TabPages.Remove(tabControl1.SelectedTab); //disable button if only one tabpage left if (tabControl1.SelectedIndex < 1) { DeleteMatch_Butt.Enabled = false; } } private void tabControl1_SelectedIndexChanged(object sender, EventArgs e) { TabPanel.Parent = tabControl1.SelectedTab; } private void MinutesPlayed_Num_ValueChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.MinutesPlayed = (int)MinutesPlayed_Num.Value; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void GoalsScored_Num_ValueChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Goals = (int)GoalsScored_Num.Value; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void PenaltiesScored_Num_ValueChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Penalties = (int)PenaltiesScored_Num.Value; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void YellowCard_RadioButt_CheckedChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.CardGiven = 'Y'; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void RedCard_RadioButt_CheckedChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.CardGiven = 'R'; ClubData[CurrentPlayerShown] = PlayerMemberData; } #endregion #region PlayerDetails private void FirstNameTextBox_TextChanged(object sender, EventArgs e) { //1. Create a new empty structure to hold member data FootballClub PlayerMemberData = new FootballClub(0); //2. Copy content of the current entry into the new empty structure PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; //3. Change only the name currently shown in the GUI in the structure PlayerMemberData.Firstname = FirstNameTextBox.Text; //4. overwrite the old data with the changed one. ClubData[CurrentPlayerShown] = PlayerMemberData; } private void SurnameTextBox_TextChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Surname = SurnameTextBox.Text; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void PlayerAge_ValueChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.age = (int)PlayerAge.Value; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void Address1_Text_TextChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Address1 = Address1_Text.Text; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void Address2_Text_TextChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Address2 = Address2_Text.Text; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void City_Text_TextChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.City = City_Text.Text; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void Country_Text_TextChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Country = Country_Text.Text; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void Postcode_Text_TextChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Postcode = Postcode_Text.Text; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void HomeNumber_Text_TextChanged(object sender, EventArgs e) { int HomeNum; FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; HomeNum = Convert.ToInt32(HomeNumber_Text.Text); PlayerMemberData.HomeNum = HomeNum; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void MobileNum_Text_TextChanged(object sender, EventArgs e) { int MobNum; FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; MobNum = Convert.ToInt32(MobileNum_Text.Text); PlayerMemberData.HomeNum = MobNum; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void Email_Text_TextChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Email = Email_Text.Text; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void EmergName_Text_TextChanged(object sender, EventArgs e) { FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.EmergencyName = EmergName_Text.Text; ClubData[CurrentPlayerShown] = PlayerMemberData; } private void EmergNum_Text_TextChanged(object sender, EventArgs e) { int EmergNumber; FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; EmergNumber = Convert.ToInt32(EmergNum_Text.Text); PlayerMemberData.EmergencyNum = EmergNumber; ClubData[CurrentPlayerShown] = PlayerMemberData; } #endregion #region ShowMember private void ShowCurrentMember() { FootballClub PlayerMemberData; PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; FirstNameTextBox.Text = PlayerMemberData.Firstname; SurnameTextBox.Text = PlayerMemberData.Surname; PlayerAge.Value = PlayerMemberData.age; Address1_Text.Text = PlayerMemberData.Address1; Address2_Text.Text = PlayerMemberData.Address2; City_Text.Text = PlayerMemberData.City; Country_Text.Text = PlayerMemberData.Country; Postcode_Text.Text = PlayerMemberData.Postcode; HomeNumber_Text.Text = " " + PlayerMemberData.HomeNum; MobileNum_Text.Text = " " + PlayerMemberData.MobNum; Email_Text.Text = PlayerMemberData.Email; EmergName_Text.Text = PlayerMemberData.EmergencyName; EmergNum_Text.Text = " " + PlayerMemberData.EmergencyNum; MinutesPlayed_Num.Value = PlayerMemberData.MinutesPlayed; GoalsScored_Num.Value = PlayerMemberData.Goals; PenaltiesScored_Num.Value = PlayerMemberData.Penalties; if (PlayerMemberData.CardGiven == 'Y') YellowCard_RadioButt.Checked = true; else RedCard_RadioButt.Checked = true; TotalTime_Text.Text = " " + PlayerMemberData.MinutesPlayed; TotalGoals_Text.Text = " " + PlayerMemberData.Goals; TotalPenalties_Text.Text = " " + PlayerMemberData.Penalties; Player1.Text = "Player " + (CurrentPlayerShown + 1); UpdatePrevNextBtnStatus(); } private void UpdatePrevNextBtnStatus() { if (CurrentPlayerShown = (ClubData.Count - 1)) NextPlayer_Butt.Enabled = false; else NextPlayer_Butt.Enabled = true; } #endregion #region Clear private void Clear_Butt_Click(object sender, EventArgs e) { ClearDetails(); } private void ClearDetails() { //clear the data struct FootballClub PlayerMemberData = new FootballClub(0); PlayerMemberData = (FootballClub)ClubData[CurrentPlayerShown]; PlayerMemberData.Firstname = ""; PlayerMemberData.Surname = ""; PlayerMemberData.age = 0; PlayerMemberData.Address1 = ""; PlayerMemberData.Address2 = ""; PlayerMemberData.City = ""; PlayerMemberData.Country = ""; PlayerMemberData.Postcode = ""; PlayerMemberData.HomeNum = 0; PlayerMemberData.MobNum = 0; PlayerMemberData.Email = ""; PlayerMemberData.EmergencyName = ""; PlayerMemberData.EmergencyNum = 0; PlayerMemberData.MinutesPlayed = 0; PlayerMemberData.Goals = 0; PlayerMemberData.Penalties = 0; PlayerMemberData.CardGiven = ' '; ClubData[CurrentPlayerShown] = PlayerMemberData; ShowCurrentMember(); } #endregion #region Save private void SaveDetails() { // CREATE a file for saving (technically a 'FileStream') FileStream fs = new FileStream(PlayerDetails, FileMode.Create); // Construct a BinaryFormatter and use it to serialise the data to the stream. // this "serialises" the ArrayList into binary (ie not to human readable text file) BinaryFormatter binFormatter = new BinaryFormatter(); // Write the file to disk binFormatter.Serialize(fs, ClubData); // Close the file fs.Close(); } // end of Save method private void Form1_FormClosing(object sender, FormClosingEventArgs e) { SaveDetails(); } #endregion #region Load private void LoadDetails() { // OPEN file for loading FileStream fs = new FileStream(PlayerDetails, FileMode.Open); // Construct a BinaryFormatter for de-serialisation of data from the stream. BinaryFormatter binFormatter = new BinaryFormatter(); // Read the file from disk ClubData = (ArrayList)binFormatter.Deserialize(fs); // Close the file fs.Close(); CurrentPlayerShown = 0; ShowCurrentMember(); } private void Form1_Load(object sender, EventArgs e) { LoadDetails(); } #endregion private void PrevPlayer_Butt_Click(object sender, EventArgs e) { --CurrentPlayerShown; ShowCurrentMember(); UpdatePrevNextBtnStatus(); } private void NextPlayer_Butt_Click(object sender, EventArgs e) { ++CurrentPlayerShown; ShowCurrentMember(); UpdatePrevNextBtnStatus(); if (Regex.IsMatch(Postcode_Text.Text, @"^(GIR 0AA|[A-PR-UWYZ]([0-9]{1,2}|([A-HK-Y][0-9]|[A-HK-Y][0-9]([0-9]|[ABEHMNPRV-Y]))|[0-9][A-HJKPS-UW]) {0,1}[0-9][ABD-HJLNP-UW-Z]{2})$")) { errorProvider1.SetError(Postcode_Text, String.Empty); } else { errorProvider1.SetError(Postcode_Text, "Not a UK postcode!\nPlease Try again."); } if (Regex.IsMatch(Email_Text.Text, @"^(?[\w\.]+)\@(?.+)\.(?\w{2,}$)")) { errorProvider1.SetError(Email_Text, String.Empty); } else { errorProvider1.SetError(Email_Text, "Not a Valid Emailaddress!\n Please Try Again"); } if(Regex.IsMatch(HomeNumber_Text.Text, @"(\s*\(?0\d{4}\)?(\s*|-)\d{3}(\s*|-)\d{3}\s*)|(\s*\(?0\d{3}\)?(\s*|-)\d{3}(\s*|- )\d{4}\s*)|(\s*(7|8)(\d{7}|\d{3}(\-|\s{1})\d{4})\s*)")) { errorProvider1.SetError(HomeNumber_Text, "Not a Valid UK Phone Number!\n Please Try Again."); } else { errorProvider1.SetError(HomeNumber_Text, string.Empty); } if (Regex.IsMatch(MobileNum_Text.Text, @"^[0-9]{10,11}$")) { errorProvider1.SetError(MobileNum_Text, "Not a Valid Mobile Number\n Please Try Again"); } else { errorProvider1.SetError(MobileNum_Text, string.Empty); } if (Regex.IsMatch(EmergNum_Text.Text, @"^[0-9]{10,11}$")) { errorProvider1.SetError(EmergNum_Text, "Not a Valid Mobile Number\n Please Try Again"); } else { errorProvider1.SetError(EmergNum_Text, string.Empty); } } private void NewPlayer_Butt_Click(object sender, EventArgs e) { FootballClub PlayerMemberData; PlayerMemberData = new FootballClub(1); PlayerMemberData.Firstname = ""; PlayerMemberData.Surname = ""; PlayerMemberData.age = 0; PlayerMemberData.Address1 = ""; PlayerMemberData.Address2 = ""; PlayerMemberData.City = ""; PlayerMemberData.Country = ""; PlayerMemberData.Postcode = ""; PlayerMemberData.HomeNum = 0; PlayerMemberData.MobNum = 0; PlayerMemberData.Email = ""; PlayerMemberData.EmergencyName = ""; PlayerMemberData.EmergencyNum = 0; PlayerMemberData.MinutesPlayed = 0; PlayerMemberData.Goals = 0; PlayerMemberData.Penalties = 0; PlayerMemberData.CardGiven = ' '; ClubData.Add(PlayerMemberData); ClubData.Sort(new MonarchNameComparer()); ShowCurrentMember(); } public class MonarchNameComparer : IComparer { public int Compare(object x, object y) { return ((FootballClub)x).Firstname.CompareTo(((FootballClub)y).Firstname); } } private void DeletePlayer_Butt_Click(object sender, EventArgs e) { ClubData.RemoveAt(CurrentPlayerShown); ShowCurrentMember(); } private void Searching_Butt_Click(object sender, EventArgs e) { Search_Form Search = new Search_Form(); //"this" is passing the main form to the second form to be able to control the main form... Search.Show(); } } }
private void SearchButt_Click(object sender, EventArgs e) { string toFind; string source; toFind = Search_Text.Text; toFind = toFind.ToLower(); // Convert toFind string to lowercase for (int i = 0; i < ClubData.Count; ++i) { // Assemble the source string through which we then can search source = (()ClubData[i]).FirstName + ((FootballData)ClubData[i]).age; source = source.ToLower(); // Convert source string to lowercase if (source.Contains(toFind)) { currentMemberShown = i; ShowCurrentMember(); break; // break out of the 'for' loop } if (i == (ClubData.Count - 1)) { MessageBox.Show(toFind + " not found"); } } // end of 'for' loop this.Close(); } // end of SearchBtn even handler }
}
有很多方法可以做到这一点。 一种方法是为Search_Form创建一个新的构造函数，它接收您的ClubData 。
// Search_Form.cs FootballClub ClubData; public Search_Form(FootballClub cdata) { ClubData = cdata; }
然后，您可以实例化它
Search_Form Search = new Search_Form(ClubData); Search.Show();
此外，您应该尝试避免使用ArrayLists并选择通用集合，例如List 。
另一种方法是公开变量/无论你想要访问什么，然后像这样：
我们在表单1中说我们有这个变量：
string greeting = "Hello, how are you?"
然后你想要在表2中访问：
Form1 f = new Form1(); //And then you acces the variable writing an f. before then name of it. What you´re doing here is creating an instance of Form 1 in Form 2. //Example: string ui = f.greeting; //Another one: if(f.greeting != "Hello") { //Whatever }
希望它有效!!