Question

我正在为Windows应用程序编写一些代码，但事情进展顺利，除了IntelliSense在某些点击事件范围内没有给出选项。令人惊讶的是，当我在没有它的帮助的情况下对它进行编码时，它并没有在我的代码行上给出任何红色波浪形，所以我假设范围是正常的。

我有两个表单，FormA和FormB，FormA上的按钮点击事件应触发FormB，其文本框中包含运行逻辑后收到的信息连接。我是怎么做的

formSrchResult.txtSearchFirstName.Text = searchedInfo.FirstName;
formSrchResult.txtSearchLastName.Text = searchedInfo.LastName;
formSrchResult.txtSearchUsername.Text = searchedInfo.UserName;
formSrchResult.txtSearchEmail.Text = searchedInfo.Email;

formSearchResult是FormSearch(FormB)的对象，searchedInfo是类的对象，具有存储数据的属性，我希望FormSearch中的文本框显示。 FormSearch和searchedInfo都被公开，但是当我开始输入

时

“formSrchResult”。 +“ctrl + space”

IntelliSense没有列出包含文本框和属性名称的列表。所以，我想知道是否有人会对导致这种情况的原因有所了解，我很想知道。顺便说一句，它的Visual Studio 2012。

感谢。

public class UserInfo
{
    public int UserID { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string Email { get; set; }
    public string UserName { get; set; }
}

这是存储搜索信息的类，下面是搜索方法的代码......

public UserInfo Search(string email)
{
    UserInfo searchUserInfo = new UserInfo();

    try
    {
        conn.Open();
        SqlCommand cmd = new SqlCommand("spListEverything", conn);
        cmd.CommandText = "spListEverything";
        cmd.CommandType = CommandType.StoredProcedure;
        cmd.Parameters.AddWithValue("@Email", email);

        SqlDataReader rdrSearch = cmd.ExecuteReader();

        if (rdrSearch.Read())
        {
            //why do we need to convert the first name, last name etc to ToString
            //when they are defined, in the database, as a string itself?
            searchUserInfo.UserID = Convert.ToInt32(rdrSearch["UserID"]);
            searchUserInfo.FirstName = rdrSearch["FirstName"].ToString();
            searchUserInfo.LastName = rdrSearch["LastName"].ToString();
            searchUserInfo.UserName = rdrSearch["UserName"].ToString();
            searchUserInfo.Email = rdrSearch["Email"].ToString();
        }
        else 
        {
            // "Sorry, no match found";
        }

        }
    catch (Exception ex)
    {
    }
    finally
    {
       conn.Close();
    }
    return searchUserInfo;
}

以下是我对btnClick事件的编码，其中Intellisense没有帮助

private void btnSearch_Click(object sender, EventArgs e)
{
    string email = txtSearchEmail.Text.ToString();

    Manage myManage = new Manage(); //to call the search function
    FormSearchResult formSrchResult = new FormSearchResult();//to put the vlaues in the textboxes in that form

    UserInfo searchedInfo = myManage.Search(email);

    //the search function is not working properly. No value is returned to be stored
    //in the userInfo object

    //Here for some reason my intellisense is not providing options.

    formSrchResult.txtSearchFirstName.Text = searchedInfo.FirstName;
    formSrchResult.txtSearchLastName.Text = searchedInfo.LastName;
    formSrchResult.txtSearchUsername.Text = searchedInfo.UserName;
    formSrchResult.txtSearchEmail.Text = searchedInfo.Email;

    txtSearchFirstName.Enabled = false;
    formSrchResult.ShowDialog();
}

Answer 1

Windows窗体控件不是窗体的静态属性，因此您需要创建一个formSrchResult类型的对象，以便能够从另一个类访问其任何控件。类需要调用静态方法或属性，而无需直接引用该类型的对象。

这样的事情：

public partial class FormB : Form
{
    private formSrchResult formSR; // this is a private field that is accessible to any method in your FormB class - you must initialize it first before trying to do anything on the object or you will receive a null reference

    private void Search_Click(object sender, EventArgs e)
    {
        SearchResult searchedInfo = DoSearch();
        formSR = new formSrchResult();
        formSR.txtSearchFirstName.Text = searchedInfo.FirstName;
        formSR.txtSearchLastName.Text = searchedInfo.LastName;
        formSR.txtSearchUsername.Text = searchedInfo.UserName;
        formSR.txtSearchEmail.Text = searchedInfo.Email;
        formSR.Show();
    }

    private SearchResult DoSearch()
    { 
        // your code
    }
}

您可能还希望FormB类可以全局访问formSrchResult对象，因此您可以将其声明为私有字段。这样，您就可以从类中的任何方法访问对象。我希望这会有所帮助。

智能感知没有帮助

1 个答案: