[英]Set DropDownList Selected Value in GridView EditItemTemplate in ASP.Net
我需要使用 c# 在 asp.net 中的 gridview edititemtemplate 中填充下拉列表選擇的值。
我不能這樣做,因為在編輯下拉列表中的 gridview edititemtemplate 時,選擇了默認值,而不是在數據庫中注冊的值。
protected void GridView2_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView g2 = (GridView)sender;
g2.EditIndex = e.NewEditIndex;
GridViewRow gvCustomerRow = g2.NamingContainer as GridViewRow;
int customerId = (int)gvProducts.DataKeys[gvCustomerRow.RowIndex].Value;
sql = @String.Format(" SELECT * FROM `doTable` ");
sql += String.Format(" WHERE sID IN ('{0}') ", customerId);
g2.DataSource = GetData(sql);
g2.DataBind();
DateTime dateofBirth = new DateTime();
ddlMonth.DataSource = Enumerable.Range(1, 12).Select(a => new
{
MonthName = DateTimeFormatInfo.CurrentInfo.GetMonthName(a),
MonthNumber = a
});
ddlMonth.DataBind();
DropDownList ddlYear = (DropDownList)(g2.Rows[g2.EditIndex].FindControl("ddlYear"));
ddlYear.DataSource = Enumerable.Range(DateTime.Now.Year - 0, 12).Reverse();
ddlYear.DataBind();
ddlYear.Items.Insert(0, new ListItem("0001", "0001"));
ddlday.SelectedValue = dateofBirth.Day.ToString();
ddlMonth.SelectedValue = dateofBirth.Month.ToString();
ddlYear.SelectedValue = dateofBirth.Year.ToString();
ddlday.DataSource = Enumerable.Range(1, DateTime.DaysInMonth(DateTime.Now.Year,
Convert.ToInt32(ddlMonth.SelectedValue)));
ddlday.DataBind();
}
如果我理解你的問題:
protected void GridView2_RowEditing(object sender, GridViewEditEventArgs e)
{
GridView g2 = (GridView)sender;
g2.EditIndex = e.NewEditIndex;
GridViewRow gvCustomerRow = g2.NamingContainer as GridViewRow;
int customerId = (int)gvProducts.DataKeys[gvCustomerRow.RowIndex].Value;
DataTable dts = new DataTable();
DateTime dateofBirth = new DateTime();
sql = @String.Format(" SELECT * FROM `doTable` ");
sql += String.Format(" WHERE sID IN ('{0}') ", customerId);
using (OdbcConnection cn =
new OdbcConnection(ConfigurationManager.ConnectionStrings["Conn"].ConnectionString))
{
using (OdbcCommand cmd =
new OdbcCommand(sql, cn))
{
cmd.CommandType = CommandType.Text;
cmd.Connection.Open();
using (OdbcDataAdapter adapt =
new OdbcDataAdapter(cmd))
{
adapt.Fill(dts);
if (dts.Rows.Count > 0)
{
g2.DataSource = dts;
g2.DataBind();
DataRow row = dts.Rows[0];
if (String.IsNullOrEmpty(row["DateValuefromDB"].ToString()))
{
ddlMonth.DataSource = Enumerable.Range(1, 12).Select(a => new
{
MonthName = DateTimeFormatInfo.CurrentInfo.GetMonthName(a),
MonthNumber = a
});
ddlMonth.DataBind();
DropDownList ddlYear = (DropDownList)(g2.Rows[g2.EditIndex].FindControl("ddlYear"));
ddlYear.DataSource = Enumerable.Range(DateTime.Now.Year - 0, 12).Reverse();
ddlYear.DataBind();
ddlYear.Items.Insert(0, new ListItem("0001", "0001"));
ddlday.DataSource = Enumerable.Range(1, DateTime.DaysInMonth(DateTime.Now.Year, Convert.ToInt32(ddlMonth.SelectedValue)));
ddlday.DataBind();
ddlday.SelectedValue = dateofBirth.Day.ToString();
ddlMonth.SelectedValue = dateofBirth.Month.ToString();
ddlYear.SelectedValue = dateofBirth.Year.ToString();
}
else
{
ddlMonth.DataSource = Enumerable.Range(1, 12).Select(a => new
{
MonthName = DateTimeFormatInfo.CurrentInfo.GetMonthName(a),
MonthNumber = a
});
ddlMonth.DataBind();
DropDownList ddlYear = (DropDownList)(g2.Rows[g2.EditIndex].FindControl("ddlYear"));
ddlYear.DataSource = Enumerable.Range(DateTime.Now.Year - 0, 12).Reverse();
ddlYear.DataBind();
ddlYear.Items.Insert(0, new ListItem("0001", "0001"));
ddlday.DataSource = Enumerable.Range(1, DateTime.DaysInMonth(DateTime.Now.Year, Convert.ToInt32(ddlMonth.SelectedValue)));
ddlday.DataBind();
ddlday.SelectedValue = Convert.ToDateTime(row["DateValuefromDB"]).Day.ToString();
ddlMonth.SelectedValue = Convert.ToDateTime(row["DateValuefromDB"]).Month.ToString();
ddlYear.SelectedValue = Convert.ToDateTime(row["DateValuefromDB"]).Year.ToString();
}
}
}
}
}
}
在為下拉列表選擇項目列表的頁面上創建一個數據源。 然后將數據源綁定到ddl。 像這樣的東西:
<EditItemTemplate>
<asp:DropDownList ID="ddlEditCompany" runat="server"
DataSourceID="odsCompany" // <-- data source.
DataTextField="CompanyName"
DataValueField="CompanyID"
SelectedValue='<%# Bind("CompanyID") %>'> // <-- select here.
</asp:DropDownList>
</EditItemTemplate>
我無法發表評論,因此將發布作為答案。
“...選擇默認值而不是那些在數據庫中注冊的值”,因為您將編輯模板中的下拉菜單設置為“默認值”:
...
DateTime dateofBirth = new DateTime();
...
ddlday.SelectedValue = dateofBirth.Day.ToString();
ddlMonth.SelectedValue = dateofBirth.Month.ToString();
ddlYear.SelectedValue = dateofBirth.Year.ToString();
...
您不應該從數據庫中設置值dateofBirth嗎?
對於ddlYear,我認為最好
ddlYear.DataSource = Enumerable.Range(DateTime.Now.Year - 0, 12).Reverse().Select(x => x.ToString()).Append("0001")
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