I'd like the DropDownList to be disabled and enable it only after I click on the edit link on Gridview. As of now, it is showing the DropDownList to be disabled before and after edit link.
codes:
<asp:DropDownList ID="DropDownList1" runat="server" Height="30px" Width="190px" SelectedValue='<%# Eval("FAQGroup") %>' Enabled="false" >
<asp:ListItem Value="Most asked FAQ"></asp:ListItem>
<asp:ListItem Value="Normal FAQ"></asp:ListItem>
</asp:DropDownList>
aspx.cs
protected void gvFAQ_RowEditing(object sender, GridViewEditEventArgs e)
{
gvFAQ.Columns[3].Visible = true;
DropDownList DDL= (DropDownList)gvFAQ.Rows[e.NewEditIndex].FindControl("DropDownList1");
DDL.Enabled = true;
gvFAQ.EditIndex = e.NewEditIndex;
bind();
}
When you call bind at the end of the RowEditing event handler, the GridView is cleared and refilled, and a new DropDownList is created in each row. The control must be enabled after the data is bound, for example in the RowDataBound event handler:
protected void gvFAQ_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddl = e.Row.FindControl("DropDownList1") as DropDownList;
ddl.Enabled = e.Row.RowIndex == gvFAQ.EditIndex;
}
}
Related
i am trying to make a "clock in / out site" and one of the functions is for the user to edit old clock ins/outs. i have added a dropdown with 2 values "IND" and "UD". How do i get these values out, and send them to my "CHECKIN" sql value. I hope you know what iam trying to explain.
this is what it looks like:
The Dropdown:
<asp:TemplateField>
<ItemTemplate>
<asp:DropDownList ID="DropDownList2" runat="server"
OnSelectedIndexChanged="DropDownList2_SelectedIndexChanged">
<asp:ListItem Selected="True">Ind</asp:ListItem>
<asp:ListItem Value="UD">Ud</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
what ive tried:
protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow row = GridView1.SelectedRow;
string val = row.Cells[3].ToString();
SqlDataSource1.SelectParameters.Add("CHECKEDIN", val);
}
and aswell as:
protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
DropDownList ddl = (DropDownList)GridView1.FindControl("DropDownList2");
string val = ddl.SelectedValue;
SqlDataSource1.SelectParameters.Add("CHECKEDIN", val);
}
Both of these return "null" tho
Use RowDataBound event of GridView.
Code
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow
&& GridView1.EditIndex == e.Row.RowIndex)
{
DropDownList ddl = (DropDownList)e.Row.FindControl("DropDownList2");
string val = ddl.SelectedValue.ToString();
SqlDataSource1.SelectParameters.Add("CHECKEDIN", val);
}
}
You can cast the sender back to a DropDownlist and get the selected value
DropDownList dropDownList = sender as DropDownList;
string val = dropDownList.SelectedValue;
But how will you know with this method which row the DropDownList belongs to?
You can use a trick for that, like abusing the CSS class to get the correct row number.
<asp:DropDownList ID="DropDownList2" runat="server" OnSelectedIndexChanged="DropDownList2_SelectedIndexChanged" AutoPostBack="true" CssClass='<%# Container.DataItemIndex %>'>
And get the row number in code behind.
int rowNumber = Convert.ToInt32(dropDownList.CssClass);
In my application in c#, when I edit a row in the gridview I choose some new data from a dropdownlist.
I am populating the dropdown like this:
<asp:TemplateField HeaderText="Gender">
<ItemTemplate>
<asp:Label ID="gender" runat="server" Text='<%# Eval("gender").ToString() %>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="DDL_genderList" runat="server">
<asp:ListItem Value="" Text="---"></asp:ListItem>
<asp:ListItem Value="M" Text="M"> </asp:ListItem>
<asp:ListItem Value="F" Text="F"> </asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
</asp:TemplateField>
But when I press the 'Edit' button from the template and enters in the 'RowUpdating' event, the selected value from the dropdownlist is every time the first value from that dropdownlist.
I need selected value in dropdownlist it's the value which displays in Label gender.
Does anyone have any ideas?
I've tried many ways to set the selected value in the 'RowDataBound' event, but with no luck.
I tried this:
protected void gvProducts_RowDataBound(object sender, GridViewRowEventArgs e)
{
DataRowView dRowView = (DataRowView)e.Row.DataItem;
if ((e.Row.RowState & DataControlRowState.Edit) > 0)
{
DropDownList genderList = (DropDownList)e.Row.FindControl("DDL_genderList");
genderList.SelectedValue = dRowView[1].ToString();
}
}
You have to find Label from TemplateField (DataRow) and DropDownList from EditTemplate (EditRowState) as like:
protected void gvProducts_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
// find gender from label which is inside ItemTemplate
string lblgender = ((Label)e.Row.FindControl("gender")).Text;
if ((e.Row.RowState & DataControlRowState.Edit) > 0)
{
// find gender list from dropdownlist which is inside EditTemplate
DropDownList genderList = (DropDownList)e.Row.FindControl("DDL_genderList");
genderList.SelectedIndex =
genderList.Items.IndexOf(genderList.Items.FindByValue(lblgender));
}
}
}
I know this is very late answer but it can help to the OP.
I have a GridView that I have placed in DropDownList's in 2 columns.
<asp:TemplateField HeaderText="Upgrade" SortExpression="Upgrade">
<ItemTemplate>
<asp:Label ID="LabelUpgrade" runat="server" Text='<%# Eval("Upgrade") %>' />
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList ID="ddlUpgrade" runat="server" Width="100px">
<asp:ListItem Value="1">--Select--</asp:ListItem>
<asp:ListItem Value="2">1</asp:ListItem>
<asp:ListItem Value="3">2</asp:ListItem>
<asp:ListItem Value="4">3</asp:ListItem>
<asp:ListItem Value="5">4</asp:ListItem>
<asp:ListItem Value="6">5</asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
</asp:TemplateField>
how do I grab the item from ddlUpgrade in the codebehind?
OnUpdating Event - I don't have a way to pull the row to get the value from the drop down but I add my sql parameters here.
protected void IAP_Updating(object sender, SqlDataSourceCommandEventArgs e){}
RowUpdating Event - I can get the row here but I can't add the value to the sql parameters because e.command isn't valid here
protected void gvClients_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow _row = gvClients.Rows[e.RowIndex];
DropDownList _ddl = (DropDownList)_row.FindControl("ddlUpgrade");
SqlParameter _parm = new SqlParameter("#Upgrade", _ddl.SelectedItem.ToString());
}
On the RowUpdating event you can capture the control inside the edit template based on its ID.
GridViewRow row = GridView1.Rows[e.RowIndex];
DropDownList ddl = (DropDownList)row.FindControl("ddlUpgrade");
SqlParameter _parm = new SqlParameter("#Upgrade", ddl.SelectedItem.ToString());
e.Command.Parameters.Add(_parm);
I would add a hidden field outside the GridView:
<asp:HiddenField ID="hdnSelection" value="" runat="server" />
And change the gvClients_RowUpdating method:
protected void gvClients_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridViewRow _row = gvClients.Rows[e.RowIndex];
DropDownList _ddl = _row.FindControl("ddlUpgrade") as DropDownList;
if(_ddl != null)
{
hdnSelection.Value = _ddl.SelectedItem.Text;
IAP.Update();//Assuming IAP is the ID of the SqlDataSource
}
}
And my IAP_Updating method should look like this:
protected void IAP_Updating(object sender, SqlDataSourceCommandEventArgs e)
{
SqlParameter _parm = new SqlParameter("#Upgrade", hdnSelection.Value);
e.Command.Parameters.Add(_parm);
}
I did not test the code. You may need to tweak.
I have a page with a dropdownlist and a button on it. The initial selection on the dropdown is an empty string. I do not want this submitted to the server so I disable the button. I then want to enable the button if any other selection is made on the dropdown. However my ddlBusinessUnit_SelectedIndexChanged method is never hit when I make changes in the dropdown list.
html:
<asp:DropDownList ID="ddlBusinessUnit" EnableViewState="true" runat="server"
OnSelectedIndexChanged="ddlBusinessUnit_SelectedIndexChanged" />
code behind
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
dsDate.Date = DateTime.Today;
PopulateBusinessUnits();
StatusMessages.Visible = false;
}
bGetFiles.Enabled = false;
}
public void ddlBusinessUnit_SelectedIndexChanged(object sender, EventArgs e)
{
if (ddlBusinessUnit.SelectedItem.Text != "")
bGetFiles.Enabled = true;
}
Set AutoPostBack="true" for your dropdown.
<asp:DropDownList ID="ddlBusinessUnit" EnableViewState="true" runat="server" AutoPostBack="true"
OnSelectedIndexChanged="ddlBusinessUnit_SelectedIndexChanged" />
you're missing AutoPostBack="true" on your asp dropdown control
I have a grid view which have checkbox. Now how to get its value on serverside.
<ItemTemplate>
<asp:CheckBox
ID="chkEditable" runat="server" AlternateText="Is Editable"
OnCheckedChanged="chkEditable_CheckedChanged"
AutoPostBack="true" Value='<%# Eval("PK_ID")%>' />
</ItemTemplate>
protected void chkEditable_OnCheckedChanged(object sender, EventArgs e)
{
GridViewRow gv = (GridViewRow)(((Control)sender).NamingContainer);
int pk = this.GridView1.DataKeys[gv.RowIndex].Value.ToString();
// Get the reference of this CheckBox
CheckBox chk = gv.FindControl("chkEditable") as CheckBox ;
//do stuff
}
Add the event handler manually to the code behind page