Question

我正在尝试使用存储过程中的名称填充我的组合框。

public frmAddEdit(Book book, Author author)
    {
        _book = book;
        _author = author;
        _dataAccess = DataAccess.GetInstance;
        _dataAccess.SetConnectionString(_dataAccess.GetServerConnectionString());
        ComboFill();
        InitializeComponent();
    }

这是我的加载形式

public void AddEditBook_Load(object sender, EventArgs e)
    {

        txtTitle.Text = _book.Title;
        //comboBox1.DataSource = _book.FullName;
        //comboBox1.ValueMember = "AuthorId";
        //comboBox1.DisplayMember = "FullName";
        ComboFill();
        //txtAuthor.Text = _author.FullName;
       //txtAdd.Text = book.Title;
    }

我的组合框

private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        DataRowView view = comboBox1.SelectedItem as DataRowView;
        string fullName = view["FullName"].ToString();


    }

我在网上看到并尝试过的东西。

         public void ComboFill()
    {
        DataRow dr;
        DataTable dt = new DataTable();

        dr = dt.NewRow();
       // dr.ItemArray = new object[] { 0, "Select Author" };
        dt.Rows.InsertAt(dr, 0);
        comboBox1.DataSource = _book.FullName;
        comboBox1.ValueMember = "AuthorId";
        comboBox1.DisplayMember = "FullName";
    }

Answer 1

comboBox1.DataSource = _bool.FullName;错了。它应该是：

comboBox1.DataSource = _book;

Answer 2

//assume this that you have datatable filled from stored procedure
//This is sample for populating your combo
DataTable dt = new DataTable();
dt.Columns.Add("AuthorID", typeof(int));
dt.Columns.Add("FullName", typeof(string));

DataRow dr = null;
for (int i = 0; i < 10; i++)
{
   dr = dt.NewRow();
   dr[0] = i;
   dr[1] = "ABC" + i + 2 * i;

   dt.Rows.Add(dr);
}

comboBox1.DataSource = dt; // this will be populated from SP
comboBox1.ValueMember = "AuthorID";
comboBox1.DisplayMember = "FullName";

Answer 3

我遇到了同样的问题，我使用SqlDataAdapter修复了该问题并将其传递给我的存储过程

public void PopulateDropdown()    
{   
    // Check to see if connection is closed, to be safe, if closed then open
    if (connection_db.State == ConnectionState.Closed)
        connection_db.Open();

    SqlDataAdapter sqlData = new SqlDataAdapter("StoredProcedureHere", connection_db);

    // Must specify 'SelectCommand' when using get queries
    sqlData.SelectCommand.CommandType = CommandType.StoredProcedure;
    DataTable table = new DataTable();

    // Store data in table
    sqlData.Fill(table);


    dropdownForNames.ValueMember = "player_id";
    dropdownForNames.DisplayMember = "name";
    dropdownForNames.DataSource = table;


    // Close connection
    connection_db.Close();
}

使用存储过程中的数据填充组合框

3 个答案: