Question

我试图在gridview的编辑模式下更新数据。

它不能正确发送我的实际代码。我试图将其设置为HTML中的templateField，但它不起作用。这时，当我在gridview的编辑模式下修改日期时，程序中断。放在Page_Load中。在对网格进行排序的条件下，网格已绑定。

     if (ViewState["sorting"] == null)
    {

        String myquery = "Select * from Venituri";
        SqlConnection sqlCon = new SqlConnection(CS);
        SqlCommand cmd = new SqlCommand
        {
            CommandText = myquery,
            Connection = sqlCon
        };
        SqlDataAdapter da = new SqlDataAdapter
        {
            SelectCommand = cmd
        };
        DataSet ds = new DataSet();
        da.Fill(ds);
        GridViewIncomes.DataSource = ds;
        GridViewIncomes.DataSourceID = String.Empty;
        GridViewIncomes.DataBind(); //here is a break when I was modified with the suggest code
    }




protected void GridViewIncomes_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    SqlConnection sqlCon = new SqlConnection(CS);
    int index = GridViewIncomes.EditIndex;
    GridViewRow row = GridViewIncomes.Rows[index];
    int VenitId = Convert.ToInt32(GridViewIncomes.DataKeys[e.RowIndex].Value);
    string Denumire = ((TextBox)row.Cells[2].Controls[0]).Text.ToString().Trim();
    var MyDateInsCalendar = GridViewIncomes.Rows[GridViewIncomes.EditIndex].FindControl("Data") as Calendar;
    MyDateInsCalendar.Visible = false;
    string Suma = ((TextBox)row.Cells[4].Controls[0]).Text.ToString().Trim();
    string Descriere = ((TextBox)row.Cells[5].Controls[0]).Text.ToString().Trim();
    string sql = "UPDATE Venituri SET Denumire='" + Denumire + "',Data='" + MyDateInsCalendar + "',Suma='" + Suma + "',Descriere='" + Descriere + "' WHERE VenitId=" + VenitId + "";

    SqlCommand cmd = new SqlCommand(sql, sqlCon);
    sqlCon.Open();
    int temp = cmd.ExecuteNonQuery();
    sqlCon.Close();
    if (temp == 1)
    {

        lblSuccessMessage.Text = "Actualizat cu succes!";
    }
    GridViewIncomes.EditIndex = -1;
    lblSuccessMessage.Text = "";

}

`

.aspx <asp:BoundField HeaderText="Data" SortExpression="Data" DataField="Data" />

要将日期编辑到gridview中并在数据库中更新。

Answer 1

您的MyDateInsCalendar变量是一个对象（日历）。在您的SQL语句中使用此变量的属性之一。

例如：

<asp:GridView ID="GridView1" runat="server" AutoGenerateEditButton="true" OnRowEditing="GridView1_RowEditing" AutoGenerateColumns="false" OnRowUpdating="GridView1_RowUpdating">
    <Columns>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>                
            </ItemTemplate>
            <EditItemTemplate>
                <asp:Calendar ID="Calendar1" runat="server"></asp:Calendar>
            </EditItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

.cs

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        BindGrid();
    }
}

protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
    GridView1.EditIndex = e.NewEditIndex;
    BindGrid();
}

private void BindGrid()
{
    List<string> tmp = new List<string>();
    tmp.Add("a");
    GridView1.DataSource = tmp;
    GridView1.DataBind();
}

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    Calendar cal = GridView1.Rows[e.RowIndex].FindControl("Calendar1") as Calendar;
    string tmp = cal.SelectedDate.ToString();
    BindGrid();
}

如何在gridview中编辑日历控件？

1 个答案: