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i have used a datalist control in webpage and placed a imagebutton in the datalist and wrote onClick="Add_friend" .But when i click on that imagebutton , onClick event is not firing.
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hi sir,
please help me
sir please send me the java script for accessing the record from server like ajax.i mean i want to replace my ajax with java script.
sir please send me the java scipt for ajax in asp.net for textbox control.
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var getXmlHttpObject = function ()
{
try
{
return new XMLHttpRequest();
}
catch(e1)
{
try
{
return new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e2)
{
try
{
return new ActiveXObject("Microsoft.XMLHTTP");
}
catch(e3)
{
return false;
}
}
}
}
var xmlHttp = getXmlHttpObject();
xmlHttp.open('GET', 'getDetails.aspx', true);
xmlHttp.onreadystatechange = readyStateChange;
xmlHttp.send(null);
var readyStateChange = function ()
{
if(typeof xmlHttp == 'undefined' || !xmlHttp) return;
if(xmlHttp.readyState == 4 || xmlHttp.readyState == 'complete')
{
var result = xmlHttp.responseText;
var status = xmlHttp.status;
if (status != 200 && status != 304)
{
if(status != 0)
alert('Http Error : ' + status);
}
else
callBack(result);
}
}
function callBack(html)
{
// Do Anything
}
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hi,
i used Pager Template in Gridview Bottom Row
like bellow
<pagertemplate>
<asp:textbox runat="server" id="txt_PageNumber" width="30" height="16px" autopostback="true"
="" ontextchanged="ShowPageData" causesvalidation="false">/asp:TextBox>
i was called this "ShowPageData " in C# code.
protected void ShowPageData(object sender, EventArgs e)
{
try
{
int _pgeTxt = 0;
TextBox txt = (TextBox)gridView.BottomPagerRow.FindControl("txt_PageNumber");
if (txt.Text != "")
{
//txt.Attributes.Add("OnTextChanged", "Key1");
_pgeTxt = int.Parse(txt.Text);
}
}
catch (Exception _ex)
{ }
}
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First, learn how to format the code you post. Read this How to get an answer to your question[^], its right at the top, can't miss it. Item #7
Look at the section for Checkboxes and Textboxes
DataGridDemo[^]
I know the language. I've read a book. - _Madmatt
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I have managed to place a dropdown control iniside a gridview control.
The dropdown does indeed populate in each row...
Question:
How is it possible for the system to correctly select the text in the dropdown based on the value of the field which is driven from the database?
Is it to do with the selectedvalue?
Any suggestions please?
Thanks
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i think you use
findcontrol method and find out dropdownbox than conver that control in type dropdown than select value by selectvalue method.
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Yes, but how do I select the value in the dropdown based on the ID in the grid?
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yes you can easily do this thing in rowdatabound event of grid view
RowDatabound event of the grid view and do the code
hope below thing work for you
public void sumRows ( Object src, GridViewRowEventArgs e ) {
if ( e.Row.RowType == DataControlRowType.DataRow ) {
TableCellCollection cells = e.Row.Cells;
int priceTotal = Convert.ToDecimal(DataBinder.Eval(e.Row.DataItem, _
"UnitPrice"))
//do code to assign value to columns of the grid
}
}
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I have the following code inside the grid_RowdataBound event. Do I have to delete it and use your code instead?
//Sources dropdown in gridview...
DropDownList ddlgvSources = (DropDownList)e.Row.FindControl("ddlgvSources");
PopulateSourcesGridView(ddlgvSources);
ddlSources.SelectedIndex = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));
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no need to delete its fine i think it should work.
but i have problem with this line
ddlSources.SelectedIndex = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));
instead of above line you use below one because you are searching with find by value
ddlSources.SelectedValue= ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));
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error is:
Cannot implicitly convert type 'int' to 'string'
To help you find the cause here is what I have at present:
protected void grid_RowDataBound(object sender, GridViewRowEventArgs e)
{
//Sources dropdown in gridview...
DropDownList ddlgvSources = (DropDownList)e.Row.FindControl("ddlgvSources");
PopulateSourcesGridView(ddlgvSources);
//ddlSources.SelectedIndex = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));
ddlSources.SelectedValue = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));
}
//populate the dropdown list of the Sources in the GridView...
private void PopulateSourcesGridView(DropDownList ddl)
{
string strSourceID;
string strName;
int intSources;
DataTable dtSources = clsAccess.SourcesGet();
intSources = dtSources.Rows.Count;
ddl.Items.Clear();
for (int i = 0; i < intSources; i++)
{
strSourceID = dtSources.Rows[i]["SourceID"].ToString();
strName = dtSources.Rows[i]["SourceName"].ToString();
ddl.Items.Add(new ListItem(strName, strSourceID));
}
}
//////////////////////////////////
<EditItemTemplate>
<asp:DropDownList ID="ddlgvSources" runat="server" SelectedValue='<%# Eval("SourceName") %>'>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("SourceName") %>'></asp:Label>
</ItemTemplate>
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ddlSources.SelectedValue = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()));
Replace above line of code with following line
ListItem li= ddlSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString());
li.Selected = true;
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On clicking the edit of the row which fires the event grid_RowEditing(object sender, GridViewEditEventArgs e)
then the grid is repopulated and so on grid.databind the error is:
'ddlgvSources' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value
Any thoughts?
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this may work
ddlgvSources.ClearSelection()
put this line of code before you are going to select list item
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Not sure what you mean because I click on the edit only without doing any changes and the error occurs just before the repopulation of the grid.
And where do you mean I should put this code exactly please?
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According to me when you are clicking edit of that grid its selecting vlaue in dropdown box again some how so according to me you just clear selection of the dropdown box before going to select for item in it
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Apologies but not sure where exactly in the code you want me to put this...
Anyway, In the grid the cell has a text value and so does the droop down. I would like to match the dropdowntext with the text in the cell of the grid.
So this is what I am doing but the selected text is not selected in the droopdown. Do you see why?
ddlgvSources.SelectedValue = ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString())).ToString();
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I am breaking down the result so hoopefully it helps you more:
DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()
returns
"Isor"
ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString())
returns
null
ddlgvSources.Items.IndexOf(ddlgvSources.Items.FindByValue(DataBinder.Eval(e.Row.DataItem, "SourceName").ToString()))
returns
-1
please note that I would like the text "isor" to be selected in the dropdown
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solved by using findbytext.
Thank you
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Hi,
I am unable to retrieve the cell value of the selected row.
The column is set to readonly=true and visible=false
In the grid_rowupdating event
This should be referring to the 2nd coluomn in the grid.
string strValue = ((TextBox)grid.Rows[e.RowIndex].Cells[1].Controls[0]).Text;
The error is:
Specified argument was out of the range of valid values.
Parameter name: index
Any thoughts please?
Thanks
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You've marked it as visible=false so the column won't render and thus will not be available.
You may want to look here, and elsewhere, for some tips and ideas
DataGridDemo[^]
I know the language. I've read a book. - _Madmatt
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solved.
I am using a template and yet it is still invisible which is fine.
Thanks
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hi,
I have managed to put a dropdown control inside a GridView for each row.
How do i populate the dropdownlist control with the required data?
Thanks
modified on Tuesday, January 26, 2010 10:18 AM
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This is solved by using a column template instead.
Thanks
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