[英]How to populate gridview on button_click after searching from access database?
[英]How to get values from multiple DropDownLists in a GridView on button_click?
我在asp.net網絡表單上有一個GridView
,所有列和行都是從后面用C#代碼創建的。 除了第一列之外,每列中的每個單元格都是一個具有DataSource
的DropDownList
。
這是我的GridView
:
<asp:GridView ID="gv_Rota" runat="server" AutoGenerateColumns="false" OnRowDataBound="gv_Rota_RowDataBound">
<HeaderStyle BackColor="#6a3d98" ForeColor="White" Height="20" />
<RowStyle HorizontalAlign="Center" Height="20px" Width="100px" />
<AlternatingRowStyle Height="20px" />
</asp:GridView>
以及列和單元格的c#創建:
private void BindGrid(int Amount)
{
gv_Rota.DataSource = null;
gv_Rota.Columns.Clear();
BoundField bfield = new BoundField();
bfield.HeaderText = "Days";
bfield.DataField = "Days";
gv_Rota.Columns.Add(bfield);
for (int i = 0; i < Amount; i++)
{
int week = i + 1;
string sWeek = "Week " + week.ToString();
TemplateField tfield = new TemplateField();
tfield.HeaderText = sWeek;
gv_Rota.Columns.Add(tfield);
}
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("Days", typeof(string)));
dt.Rows.Add("M");
dt.Rows.Add("T");
dt.Rows.Add("W");
dt.Rows.Add("T");
dt.Rows.Add("F");
dt.Rows.Add("S");
dt.Rows.Add("S");
gv_Rota.DataSource = dt;
gv_Rota.DataBind();
}
然后在GridView
的RowDataBound
觸發器上,將DropDownList
控件添加到每個單元格:
protected void gv_Rota_RowDataBound(object sender, GridViewRowEventArgs e)
{
for (int i = 1; i <= ColumnCount; i++)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
ddlShift = new DropDownList();
ddlShift.ID = "ddlShift";
ddlShift.DataSource = DCListOfShifts;
ddlShift.DataValueField = "SHIFT_ID";
ddlShift.DataTextField = "SHIFT_NAME";
ddlShift.DataBind();
ddlShift.Items.Insert(0, new ListItem("Shift..."));
ddlShift.CssClass = "ddl_rotamanager";
e.Row.Cells[i].Controls.Add(ddlShift);
}
}
}
例如在我的頁面上顯示的內容:
所以我的問題是,我現在想將每列(第一列除外)保存到數據庫中,作為“預定的一周”,並且不知道如何將所有或任何DropDownLists
的選定項目的值然后將其傳遞回數據庫。 切記,這不是對selectedindexchanged
完成的。 我將從所有DropDownLists
選擇項目,然后按一個按鈕提交值。 請有人給我一些如何完成的重點嗎? 謝謝。
編輯1:響應說明了如何獲取行或單個單元格中DropDownList的每個值。 但是,現在我需要更具體地了解如何獲取列而不是行中特定單元格的值。 是否有可能對此進一步強調?
使用Gridview.Rows
屬性
protected void MyButton_Click(object sender, EventArgs e)
{
foreach(GridViewRow row in gv_Rota.Rows)
{
//find this control in this row
DropDownList dd = row.FindControl("MyDropdown") as DropDownList;
//OR
//find this control in a specific cell
DropDownList day = row.Cells[0].FindControl("MyDropdown") as DropDownList;
DropDownList Week1 = row.Cells[1].FindControl("ddShift") as DropDownList;
//this is just a pseudo-code to determine which dropdown was selected per row.
//You can improve on this
if(dd1.SelectedValue != string.Empty)
thisDay.SelectedWeek = dd1.SelectedValue;
else if(dd2.SelectedValue != string.Empty)
thisDay.SelectedWeek = dd2.SelectedValue;
....
}
}
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