我的editable Gridview列名为Country，其列表很长。
当我显示数据时，Country的值位于Label，但当我选择修改时，应显示DropDownList国家/地区列表。我能够显示列表。 it should show the country selected as that was in label。
我已尝试使用此功能，但下拉列表中填充了System.Row.DataRowView，但未将其设置为以cvalue
aspx页面
<asp:TemplateField HeaderText="Country">
<ItemTemplate>
<asp:Label ID="lblCountry" runat="server" Text='<%#Bind("Country")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="ddlCCountry" runat="server" Height="21px" Style="margin-left: 0px"
Width="194px">
<asp:ListItem Value="-1">Select..</asp:ListItem>
<asp:ListItem Value="af">Afghanistan</asp:ListItem>
<asp:ListItem Value="ax">Aland Islands</asp:ListItem>
<asp:ListItem Value="al">Albania</asp:ListItem>
</asp:DropDownList>
<EditItemTemplate>
.cs文件
void gvhoteldetail_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowState == DataControlRowState.Edit)
{
string cnm="",cvalue="";
string getCountry = "Select * from tbl_countrynames where `Name`='" + cname + "'";
string getCountrynames = "Select * from tbl_countrynames";
MySqlConnection con = new MySqlConnection(connection);
MySqlCommand cmd1 = new MySqlCommand(getCountrynames, con);
DataSet ds1 = new DataSet();
MySqlDataAdapter da1 = new MySqlDataAdapter(cmd1);
da1.Fill(ds1);
MySqlCommand cmd = new MySqlCommand(getCountry, con);
DataSet ds = new DataSet();
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
da.Fill(ds);
if (ds.Tables[0].Rows.Count > 0)
{
cnm = ds.Tables[0].Rows[0]["Name"].ToString();
cvalue = ds.Tables[0].Rows[0]["Value"].ToString();
}
DropDownList ddlcountry = (DropDownList)e.Row.FindControl("ddlCCountry");
ddlcountry.DataSource = ds1;
ddlcountry.SelectedValue = cvalue;
ddlcountry.DataBind();
}
可能出现什么问题？
答案 0 :(得分：2)
这对我有用。在填充GridView时，您应该在RowDataBound事件中填充每个DropDownList：
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
numberFormatDA formatDA = new numberFormatDA();
DataTable mytable = new DataTable();
DataColumn formatIDcolumn = new DataColumn("fkNumberFormat");
DataColumn formatNameColumn = new DataColumn("numberFormat");
mytable.Columns.Add(formatIDcolumn);
mytable.Columns.Add(formatNameColumn);
DataSet ds = new DataSet();
ds = formatDA.getNumberFormatsDS();
if ((e.Row.RowState & DataControlRowState.Edit) > 0)
{
TextBox txtSite = (TextBox)e.Row.FindControl("txtIDSite");
DropDownList ddl = (DropDownList)e.Row.FindControl("ddlNumberFormat");
DataRow[] rows = ds.Tables[0].Select();
foreach (DataRow row in rows)
{
DataRow newrow = mytable.NewRow();
newrow["fkNumberFormat"] = row["idnumberFormat"];
newrow["numberFormat"] = row["numberFormat"];
mytable.Rows.Add(newrow);
}
ddl.DataSource = mytable;
ddl.DataTextField = "numberFormat";
ddl.DataValueField = "fkNumberFormat";
int numberFormatID = 0;
Label lblFormatID = (Label)e.Row.FindControl("numberFormatLabel");
numberFormatID = Int32.Parse(lblFormatID.Text);
ddl.SelectedValue = numberFormatID.ToString();
ddl.DataBind();
}
}
希望这有帮助！
答案 1 :(得分：1)
通过这种方式你可以使它工作，但我知道有更好的方法来实现这一点.. 现在试试这个......
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
GridViewRow gvr = GridView1.Rows[e.NewEditIndex];
Label lb = (Label)gvr.FindControl("lblCountry");
GridView1.EditIndex = e.NewEditIndex;
binddata();
getselected(lb.Text);
}
private void getselected(string text)
{
GridViewRow gvr = GridView1.Rows[GridView1.EditIndex];
DropDownList dr = (DropDownList)gvr.FindControl("ddlCCountry");
dr.SelectedIndex = dr.Items.IndexOf(dr.Items.FindByText(text));
}
答案 2 :(得分：1)
protected void gvGeneralMaster_RowEditing(object sender, GridViewEditEventArgs e)
{
try
{
if (clsGeneral._strRights[2] == "0")
{
//ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "ShowAlert", "ShowAlert();", true);
//ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "ShowUnAuthorisedMsg", "ShowUnAuthorisedMsg();", true);
Response.Redirect("UnauthorizedUser.aspx");
}
else
{
GridViewRow gvRow = (GridViewRow)gvGeneralMaster.Rows[e.NewEditIndex];
ViewState["COUNTRY"] = ((Label)gvRow.FindControl("lblCountry")).Text.Trim();
ViewState["STATE"] = ((Label)gvRow.FindControl("lblState")).Text.Trim();
gvGeneralMaster.EditIndex = e.NewEditIndex;
GetGeneralDetails();
}
}
catch (Exception ex)
{
lblErrorMsg.Text = ex.Message.ToString();
if (!ex.Message.ToString().Contains("Thread was being aborted."))
{
//oBL_ClsLog.SaveLog(Convert.ToString(Session["CurrentUser"]).Trim(), "Exception", ex.Message.ToString(), "GROUP MASTER");
ErrMsg = ex.Message.ToString(); try { string[] arrErr = ex.Message.ToString().Split('\n'); ErrMsg = arrErr[0].ToString().Trim(); }
catch { } Response.Redirect("Error.aspx?Error=" + ErrMsg.ToString().Trim());
}
}
}
protected void gvGeneralMaster_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
try
{
if (clsGeneral._strRights[2] == "0")
{
//ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), "ShowAlert", "ShowAlert();", true);
//ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "ShowUnAuthorisedMsg", "ShowUnAuthorisedMsg();", true);
Response.Redirect("UnauthorizedUser.aspx");
}
else
{
GridViewRow gvRow = (GridViewRow)gvGeneralMaster.Rows[e.RowIndex];
oPRP._GeneralCode = int.Parse(((Label)gvRow.FindControl("lblEGenCode")).Text.Trim());
oPRP._GenaralName = ((TextBox)gvRow.FindControl("txtECity")).Text.Trim();
oPRP._StateName = ((DropDownList)gvRow.FindControl("ddlEState")).SelectedItem.Text.Trim() != "SELECT" ? ((DropDownList)gvRow.FindControl("ddlEState")).SelectedItem.Text.Trim() : "";
oPRP._CountryName = ((DropDownList)gvRow.FindControl("ddlECountry")).SelectedItem.Text.Trim() != "SELECT" ? ((DropDownList)gvRow.FindControl("ddlECountry")).SelectedItem.Text.Trim() : "";
oPRP._Remarks = ((TextBox)gvRow.FindControl("txtERemarks")).Text.Trim();
oPRP._Active = ((CheckBox)gvRow.FindControl("chkEditActive")).Checked;
oPRP._ModifiedBy = Session["CurrentUser"].ToString();
oDAL.SaveUpdateGeneralMaster("UPDATE", oPRP);
gvGeneralMaster.EditIndex = -1;
GetGeneralDetails();
}
}
catch (Exception ex)
{
lblErrorMsg.Text = ex.Message.ToString();
if (!ex.Message.ToString().Contains("Thread was being aborted."))
{
//oBL_ClsLog.SaveLog(Convert.ToString(Session["CurrentUser"]).Trim(), "Exception", ex.Message.ToString(), "GROUP MASTER");
ErrMsg = ex.Message.ToString(); try { string[] arrErr = ex.Message.ToString().Split('\n'); ErrMsg = arrErr[0].ToString().Trim(); }
catch { } Response.Redirect("Error.aspx?Error=" + ErrMsg.ToString().Trim());
}
}
}
答案 3 :(得分：0)
这个答案为时已晚，但希望能帮助别人。您可以将SelectedValue属性放在dropdownlist标记中，如下所示：
<asp:DropDownList SelectedValue='<% Eval("Country") %>' ID="ddlCCountry" runat="server" Height="21px" Style="margin-left: 0px" Width="194px">
<asp:ListItem Value="-1">Select..</asp:ListItem>
<asp:ListItem Value="af">Afghanistan</asp:ListItem>
<asp:ListItem Value="ax">Aland Islands</asp:ListItem>
<asp:ListItem Value="al">Albania</asp:ListItem>
</asp:DropDownList>