列表视图中的空项目 [英] Empty items in listview

问题描述

我的问题是，当我从Form2的文本框中插入值时，Listview(Form1)中的项目为空.我真的不知道为什么它是空的.有人帮我提供此代码吗?！

My problem is when i insert values from textboxes in Form2 the items in Listview (Form1) is empty. I dont really know why its empty. Somebody help me with this code please?!

InitializeComponent(); 
 
listView1.View = View.Details; 
listView1.LabelEdit = true; 
listView1.AllowColumnReorder = true; 
listView1.FullRowSelect = true; 
listView1.GridLines = true; 
listView1.Sorting = SortOrder.Ascending; 
 
listView1.FullRowSelect = true; 
listView1.Columns.Add("ID", 300, HorizontalAlignment.Left); 
listView1.Columns.Add("Name", 70, HorizontalAlignment.Left); 
listView1.Columns.Add("Zipcode", 70, HorizontalAlignment.Left); 
listView1.Columns.Add("City", 100, HorizontalAlignment.Left); 
listView1.Columns.Add("Country", 100, HorizontalAlignment.Left); 
listView1.Columns.Add("Phone", 100, HorizontalAlignment.Left); 
listView1.Columns.Add("Email", 100, HorizontalAlignment.Left);

Form2

Form2

private void btnOk_Click(object sender, EventArgs e) 
       { 
           contact.FirstName = tbFirstName.Text; 
           firstName = contact.FirstName; 
 
           contact.LastName = tbLastName.Text; 
           lastName = contact.LastName; 

Form2

Form2

private void btnOk_Click(object sender, EventArgs e) 
        { 
            MainForm main = new MainForm(); 
 
            contact.FirstName = tbFirstName.Text; 
            firstName = contact.FirstName; 
 
            contact.LastName = tbLastName.Text; 
            lastName = contact.LastName;

Form2

Form2

public override string ToString() 
    { 
        return string.Format("[{0}]", contact.ToString()); 
 
    } 

接触类

Contact class

class Contact 
    { 
    private string firstName; 
    private string lastName 

在Contact类中，还具有上述变量的属性，然后是像这样的ToString

In the Contact class there is also properties of the above variables and then a ToString like this

public override string ToString() 
        { 
            return string.Format("[{0}, {1}, {2}, {3}]", firstName, lastName); 
 
 
        } 

Form1

Form1

private void MainForm_Load(object sender, EventArgs e) 
        { 
            ColumnHeader columnheader; 
            ListViewItem listviewitem; 
 
            // Ensure that the view is set to show details. 
            listView1.View = View.Details; 
if (customerframe.ShowDialog() == DialogResult.OK) //if button OK is clicked then value will be inserted 
            { 
                listviewitem = new ListViewItem(contact.FirstName); 
                listviewitem.SubItems.Add(contact.LastName); 
this.listView1.Items.Add(listviewitem); 

推荐答案

第一个错误我可以看到:

First bug I can see it this:

return string.Format("[{0}, {1}, {2}, {3}]", firstName, lastName);

为此格式，您需要四个参数，但仅提供两个.

另外，除最左边的一个单元格外的所有单元格都通过SubItems填充.我发现只有一个使用此属性的地方.您将FirstName添加到第一列，并在下一列中填写LastName.但是您有7列，它们分别被命名为"ID"，名称"，邮政编码"等，而不是姓氏/名字.您在哪里填写其余的列?难怪你有空值...

—SA

For this format, you need four parameters, but you provide only two.

Also, all cells except leftmost one are filled via SubItems. I found only one place where this property is used. You add FirstName to a first column and fill in LastName in next one. But you have 7 columns, and they are named "ID", "Name", "Zipcode", etc., not Last/First name. Where do you fill in the rest of the columns? no wonder you have empty values…

—SA

我看到了一些愚蠢的错误并予以解决

i saw some stupid misstakes and fixed it

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