Question

我正在尝试通过编码从详细信息视图中将数据插入或更新到数据库中。没有给详细信息视图提供数据源，因为它非常简单。我想以编程方式进行。

正如我所说，我没有直接提供数据源。我是在页面加载时做的。

static string conn = ConfigurationManager.ConnectionStrings["AptechConnectionString"].ConnectionString;
SqlConnection con = new SqlConnection(conn);

protected void Page_Load(object sender, EventArgs e)
{
    DetailsView1.AutoGenerateInsertButton = true;
    DetailsView1.AutoGenerateEditButton = true;
    DetailsView1.AutoGenerateDeleteButton = true;
    Data_Bind();
}

public void Data_Bind()
{
    string query = "select * from students";
    SqlCommand cmd = new SqlCommand(query, con);
    SqlDataAdapter da = new SqlDataAdapter(cmd);
    DataTable dt = new DataTable();
    da.Fill(dt);

    DetailsView1.DataSource = dt;
    DetailsView1.DataBind();
    ViewState["Data"] = dt;
}

我试着像在gridview中那样做

protected void DetailsView1_ItemInserting(object sender, DetailsViewInsertEventArgs e)
{
    try
    {
        id = (TextBox)DetailsView1.Rows[0].Cells[1].FindControl("TextBox1");
        name = (TextBox)DetailsView1.Rows[0].Cells[1].FindControl("TextBox2");
        batch = (TextBox)DetailsView1.Rows[0].Cells[1].FindControl("TextBox3");
        enrolled = (TextBox)DetailsView1.Rows[0].Cells[1].FindControl("TextBox4");
        teacher = (TextBox)DetailsView1.Rows[0].Cells[1].FindControl("TextBox5");
    }
    catch (Exception ex)
    {
        Label1.Text = ex.Message;
        Label1.Visible = true;
    }
}

protected void DetailsView1_ItemCommand(object sender, DetailsViewCommandEventArgs e)
{
    switch (e.CommandName.ToString())
    {
        case "New":
            DetailsView1.ChangeMode(DetailsViewMode.Insert);
            Data_Bind();
            break;
    }
}

但是，当我点击编辑或插入链接按钮时，它会给我这个错误

DetailsView'DetailsView1'触发了未处理的事件ModeChanging。“

我缺少什么？

Answer 1

尝试添加ModeChanging事件处理程序：

protected void DetailsView1_ModeChanging(object sender, DetailsViewModeEventArgs e)
{
    DetailsView1.ChangeMode(e.NewMode);
    Data_Bind();
}

详细信息视图通过编码插入/更新数据

1 个答案: