网格视图上的页面加载

Question

当页面最初加载时，它只有一个文本框和一个按钮。如果我没有在框中输入任何内容并点击按钮，它将使用 SQL 选择中的所有数据行加载我的 GridView。问 - 我怎样才能使页面最初加载时，它会自己加载(加载所有行(？

我在YouTube视频中找到的这个搜索功能正是我所需要的。就像我说的，ASP是全新的，但如果需要，请告诉我，我可以更改它。

网格视图1 ：

<asp:TextBox ID="TextBox1" runat="server" Width="265px" Height="22px" CssClass="myBox"></asp:TextBox>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Search Fields" CssClass="myButton" />
<asp:GridView ID="GridView1" OnPageIndexChanging="GridView1_PageIndexChanging" OnSorting="GridView1_Sorting" runat="server" AutoGenerateColumns="true" CellPadding="4" EnableModelValidation="True" EnableTheming="True" ForeColor="#333333" GridLines="None" Width="100%" style="margin-top: 0px; text-align: center;" AllowPaging="True" AllowSorting="True" >
    <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
    <EditRowStyle BackColor="#999999" />
    <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
    <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
    <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
</asp:GridView>

代码隐藏(取出数据库名称和密码(：

SqlConnection vid = new SqlConnection("Data Source=ENF;Initial Catalog=***Database Name***;Persist Security Info=True;User ID=sa;Password=***Password***");
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
    String str = "SELECT ab.NAME as [Customer] ,ISNULL(ab.TELEPHONE1,'') as [Phone #] ,ISNULL(pb.NAME,'') as [Product] ,ISNULL(aeb.NEW_PRODUCTVERSION,'') as [Version] ,CASE WHEN ab.STATUSCODE = 1 THEN 'Active' ELSE 'Inactive' END as [Status] ,ISNULL('Sal : ' + c.SALUTATION + ' / ','') + ISNULL('Title : ' + c.JOBTITLE + ' / ','') + ISNULL(a.PRIMARYCONTACTIDNAME,'') as [Primary Contact] ,ISNULL(c.TELEPHONE1,'') as [Contact Phone] FROM ACCOUNTBASE ab LEFT JOIN ACCOUNTEXTENSIONBASE aeb on ab.ACCOUNTID = aeb.ACCOUNTID LEFT JOIN PRODUCTBASE pb on aeb.NEW_PRIMARYPRODUCTID = pb.PRODUCTID LEFT JOIN ACCOUNT a on ab.ACCOUNTID = a.ACCOUNTID LEFT JOIN CONTACT c on a.PRIMARYCONTACTID = c.CONTACTID WHERE ((ab.NAME LIKE '%' + @search + '%') OR (aeb.NEW_PRODUCTVERSION LIKE '%' + @search + '%') OR (pb.NAME LIKE '%' + @search + '%') OR (a.PRIMARYCONTACTIDNAME LIKE '%' + @search + '%')) ORDER BY ab.NAME";
    SqlCommand xp = new SqlCommand(str, vid);
    xp.Parameters.Add("@search", SqlDbType.NVarChar).Value = TextBox1.Text;
    vid.Open();
    xp.ExecuteNonQuery();
    SqlDataAdapter da = new SqlDataAdapter();
    da.SelectCommand = xp;
    DataSet ds = new DataSet();
    da.Fill(ds, "Name");
    GridView1.DataSource = ds;
    GridView1.DataBind();
    vid.Close();
}

Answer 1

你的问题并不具体，因为你问了太多问题。但是，对于页面加载问题...

可以将数据库调用移动到新方法，并设置 GridViews 数据源，并在Page_Load事件上调用 DataBind(( 方法。像这样：

protected void Page_Load(object sender, EventArgs e)
{
    if (!Page.IsPostBack)
    {
        GridView1.DataSource = GetData();
        GridView1.DataBind();
    }
}
private DataSet GetData()
{
    String str = "SELECT ab.NAME as [Customer] ,ISNULL(ab.TELEPHONE1,'') as [Phone #] ,ISNULL(pb.NAME,'') as [Product] ,ISNULL(aeb.NEW_PRODUCTVERSION,'') as [Version] ,CASE WHEN ab.STATUSCODE = 1 THEN 'Active' ELSE 'Inactive' END as [Status] ,ISNULL('Sal : ' + c.SALUTATION + ' / ','') + ISNULL('Title : ' + c.JOBTITLE + ' / ','') + ISNULL(a.PRIMARYCONTACTIDNAME,'') as [Primary Contact] ,ISNULL(c.TELEPHONE1,'') as [Contact Phone] FROM ACCOUNTBASE ab LEFT JOIN ACCOUNTEXTENSIONBASE aeb on ab.ACCOUNTID = aeb.ACCOUNTID LEFT JOIN PRODUCTBASE pb on aeb.NEW_PRIMARYPRODUCTID = pb.PRODUCTID LEFT JOIN ACCOUNT a on ab.ACCOUNTID = a.ACCOUNTID LEFT JOIN CONTACT c on a.PRIMARYCONTACTID = c.CONTACTID WHERE ((ab.NAME LIKE '%' + @search + '%') OR (aeb.NEW_PRODUCTVERSION LIKE '%' + @search + '%') OR (pb.NAME LIKE '%' + @search + '%') OR (a.PRIMARYCONTACTIDNAME LIKE '%' + @search + '%')) ORDER BY ab.NAME";
    SqlCommand xp = new SqlCommand(str, vid);
    xp.Parameters.Add("@search", SqlDbType.NVarChar).Value = TextBox1.Text;
    vid.Open();
    xp.ExecuteNonQuery();
    SqlDataAdapter da = new SqlDataAdapter();
    da.SelectCommand = xp;
    DataSet ds = new DataSet();
    da.Fill(ds, "Name");    
    vid.Close();
    return ds;
}