ListView InsertItemPosition not changing on Databound event
I am using a ListView to show user info, stored in a table. I only want to show one record.
When the user first starts using the site, there will not be an initial record, so I need the InsertItemTemplate to be visible. Once a record is inserted, I need the InsertItemTemplate to disappear.
Based upon research, I have used the DataBound event to check for ListView.Item.Count and set the InsertItemPosition to either None or LastItem accordingly. I have also set a label on the page temporarily to display the results of the count.
The label is getting updated correctly. However, the InsertItemPosition is not changing until after a second postback occurs. So the result is the opposite of what it should be. It works correctly when the page loads, but then stays visible after I insert data, and then disappears if I delete the record. Any help would be appreciated. I have posted relevant code below.
protected void ListView1_DataBound(object sender, EventArgs e)
{
if (ListView1.Items.Count > 0)
{
lblRecordCount.Text = "DataBound - Records exist";
ListView1.InsertItemPosition = InsertItemPosition.None;
}
else
{
lblRecordCount.Text = "DataBound - No records exist";
ListView1.InsertItemPosition = InsertItemPosition.LastItem;
}
}
Record Count: <asp:Label ID="lblRecordCount" runat="server" Text="Nothing Happened"></asp:Label>
<br />
<asp:ListView ID="ListView1" runat="server" DataKeyNames="id" DataSourceID="SqlDataSourceGift" OnItemCreated ="ListView1_ItemCreated" OnDataBound="ListView1_DataBound" >
c# asp.net listview
edited Nov 22 '18 at 7:45
JustLearning
99321635
asked Nov 22 '18 at 4:05
Tim_007Tim_007
1
add a comment |
I am using a ListView to show user info, stored in a table. I only want to show one record.
When the user first starts using the site, there will not be an initial record, so I need the InsertItemTemplate to be visible. Once a record is inserted, I need the InsertItemTemplate to disappear.
Based upon research, I have used the DataBound event to check for ListView.Item.Count and set the InsertItemPosition to either None or LastItem accordingly. I have also set a label on the page temporarily to display the results of the count.
The label is getting updated correctly. However, the InsertItemPosition is not changing until after a second postback occurs. So the result is the opposite of what it should be. It works correctly when the page loads, but then stays visible after I insert data, and then disappears if I delete the record. Any help would be appreciated. I have posted relevant code below.
protected void ListView1_DataBound(object sender, EventArgs e)
{
if (ListView1.Items.Count > 0)
{
lblRecordCount.Text = "DataBound - Records exist";
ListView1.InsertItemPosition = InsertItemPosition.None;
}
else
{
lblRecordCount.Text = "DataBound - No records exist";
ListView1.InsertItemPosition = InsertItemPosition.LastItem;
}
}
Record Count: <asp:Label ID="lblRecordCount" runat="server" Text="Nothing Happened"></asp:Label>
<br />
<asp:ListView ID="ListView1" runat="server" DataKeyNames="id" DataSourceID="SqlDataSourceGift" OnItemCreated ="ListView1_ItemCreated" OnDataBound="ListView1_DataBound" >
c# asp.net listview
edited Nov 22 '18 at 7:45
JustLearning
99321635
asked Nov 22 '18 at 4:05
Tim_007Tim_007
1
add a comment |
I am using a ListView to show user info, stored in a table. I only want to show one record.
When the user first starts using the site, there will not be an initial record, so I need the InsertItemTemplate to be visible. Once a record is inserted, I need the InsertItemTemplate to disappear.
Based upon research, I have used the DataBound event to check for ListView.Item.Count and set the InsertItemPosition to either None or LastItem accordingly. I have also set a label on the page temporarily to display the results of the count.
The label is getting updated correctly. However, the InsertItemPosition is not changing until after a second postback occurs. So the result is the opposite of what it should be. It works correctly when the page loads, but then stays visible after I insert data, and then disappears if I delete the record. Any help would be appreciated. I have posted relevant code below.
protected void ListView1_DataBound(object sender, EventArgs e)
{
if (ListView1.Items.Count > 0)
{
lblRecordCount.Text = "DataBound - Records exist";
ListView1.InsertItemPosition = InsertItemPosition.None;
}
else
{
lblRecordCount.Text = "DataBound - No records exist";
ListView1.InsertItemPosition = InsertItemPosition.LastItem;
}
}
Record Count: <asp:Label ID="lblRecordCount" runat="server" Text="Nothing Happened"></asp:Label>
<br />
<asp:ListView ID="ListView1" runat="server" DataKeyNames="id" DataSourceID="SqlDataSourceGift" OnItemCreated ="ListView1_ItemCreated" OnDataBound="ListView1_DataBound" >
c# asp.net listview
edited Nov 22 '18 at 7:45
JustLearning
99321635
asked Nov 22 '18 at 4:05
Tim_007Tim_007
1
I am using a ListView to show user info, stored in a table. I only want to show one record.
When the user first starts using the site, there will not be an initial record, so I need the InsertItemTemplate to be visible. Once a record is inserted, I need the InsertItemTemplate to disappear.
Based upon research, I have used the DataBound event to check for ListView.Item.Count and set the InsertItemPosition to either None or LastItem accordingly. I have also set a label on the page temporarily to display the results of the count.
The label is getting updated correctly. However, the InsertItemPosition is not changing until after a second postback occurs. So the result is the opposite of what it should be. It works correctly when the page loads, but then stays visible after I insert data, and then disappears if I delete the record. Any help would be appreciated. I have posted relevant code below.
protected void ListView1_DataBound(object sender, EventArgs e)
{
if (ListView1.Items.Count > 0)
{
lblRecordCount.Text = "DataBound - Records exist";
ListView1.InsertItemPosition = InsertItemPosition.None;
}
else
{
lblRecordCount.Text = "DataBound - No records exist";
ListView1.InsertItemPosition = InsertItemPosition.LastItem;
}
}
Record Count: <asp:Label ID="lblRecordCount" runat="server" Text="Nothing Happened"></asp:Label>
<br />
<asp:ListView ID="ListView1" runat="server" DataKeyNames="id" DataSourceID="SqlDataSourceGift" OnItemCreated ="ListView1_ItemCreated" OnDataBound="ListView1_DataBound" >
Record Count: <asp:Label ID="lblRecordCount" runat="server" Text="Nothing Happened"></asp:Label>
<br />
<asp:ListView ID="ListView1" runat="server" DataKeyNames="id" DataSourceID="SqlDataSourceGift" OnItemCreated ="ListView1_ItemCreated" OnDataBound="ListView1_DataBound" >
Record Count: <asp:Label ID="lblRecordCount" runat="server" Text="Nothing Happened"></asp:Label>
<br />
<asp:ListView ID="ListView1" runat="server" DataKeyNames="id" DataSourceID="SqlDataSourceGift" OnItemCreated ="ListView1_ItemCreated" OnDataBound="ListView1_DataBound" >
c# asp.net listview
c# asp.net listview
edited Nov 22 '18 at 7:45
JustLearning
99321635
asked Nov 22 '18 at 4:05
Tim_007Tim_007
1
edited Nov 22 '18 at 7:45
JustLearning
99321635
asked Nov 22 '18 at 4:05
Tim_007Tim_007
1
edited Nov 22 '18 at 7:45
JustLearning
99321635
edited Nov 22 '18 at 7:45
JustLearning
99321635
edited Nov 22 '18 at 7:45
JustLearning
99321635
99321635
asked Nov 22 '18 at 4:05
Tim_007Tim_007
1
asked Nov 22 '18 at 4:05
Tim_007Tim_007
1
asked Nov 22 '18 at 4:05
Tim_007Tim_007
1
1
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Add your ListView inside update panel and then try to show/hide your InsertItemTemplate.
edited Nov 22 '18 at 7:17
JustLearning
99321635
answered Nov 22 '18 at 6:29
A.M. PatelA.M. Patel
629
Thank you for the suggestion. Unfortunately, I ran into a similar issue where it would work initially, then not work. I believe there may be an error with my logic when I delete the one existing row. My assumption is that the listview does not execute the databound event if the datasource is empty or there is a timing issue.
– Tim_007
Nov 23 '18 at 3:47
However, your recommendation helped me come up with a backdoor solution. I did use a updatepanel and 2 separate listviews, each nested in a division. I toggle between the divisions depending if the listview is empty or not. For some reason, the timing on making the div visible or not is accurate, similiar to the label, even though the InsertItemPosition did not get updated properly using this same method.
– Tim_007
Nov 23 '18 at 3:47
add a comment |
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1 Answer
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1 Answer
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oldest
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oldest
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oldest
votes
Add your ListView inside update panel and then try to show/hide your InsertItemTemplate.
edited Nov 22 '18 at 7:17
JustLearning
99321635
answered Nov 22 '18 at 6:29
A.M. PatelA.M. Patel
629
Thank you for the suggestion. Unfortunately, I ran into a similar issue where it would work initially, then not work. I believe there may be an error with my logic when I delete the one existing row. My assumption is that the listview does not execute the databound event if the datasource is empty or there is a timing issue.
– Tim_007
Nov 23 '18 at 3:47
However, your recommendation helped me come up with a backdoor solution. I did use a updatepanel and 2 separate listviews, each nested in a division. I toggle between the divisions depending if the listview is empty or not. For some reason, the timing on making the div visible or not is accurate, similiar to the label, even though the InsertItemPosition did not get updated properly using this same method.
– Tim_007
Nov 23 '18 at 3:47
add a comment |
Add your ListView inside update panel and then try to show/hide your InsertItemTemplate.
edited Nov 22 '18 at 7:17
JustLearning
99321635
answered Nov 22 '18 at 6:29
A.M. PatelA.M. Patel
629
Thank you for the suggestion. Unfortunately, I ran into a similar issue where it would work initially, then not work. I believe there may be an error with my logic when I delete the one existing row. My assumption is that the listview does not execute the databound event if the datasource is empty or there is a timing issue.
– Tim_007
Nov 23 '18 at 3:47
However, your recommendation helped me come up with a backdoor solution. I did use a updatepanel and 2 separate listviews, each nested in a division. I toggle between the divisions depending if the listview is empty or not. For some reason, the timing on making the div visible or not is accurate, similiar to the label, even though the InsertItemPosition did not get updated properly using this same method.
– Tim_007
Nov 23 '18 at 3:47
add a comment |
Add your ListView inside update panel and then try to show/hide your InsertItemTemplate.
edited Nov 22 '18 at 7:17
JustLearning
99321635
answered Nov 22 '18 at 6:29
A.M. PatelA.M. Patel
629
Add your ListView inside update panel and then try to show/hide your InsertItemTemplate.
edited Nov 22 '18 at 7:17
JustLearning
99321635
answered Nov 22 '18 at 6:29
A.M. PatelA.M. Patel
629
edited Nov 22 '18 at 7:17
JustLearning
99321635
edited Nov 22 '18 at 7:17
JustLearning
99321635
edited Nov 22 '18 at 7:17
JustLearning
99321635
99321635
answered Nov 22 '18 at 6:29
A.M. PatelA.M. Patel
629
answered Nov 22 '18 at 6:29
A.M. PatelA.M. Patel
629
answered Nov 22 '18 at 6:29
A.M. PatelA.M. Patel
629
629
Thank you for the suggestion. Unfortunately, I ran into a similar issue where it would work initially, then not work. I believe there may be an error with my logic when I delete the one existing row. My assumption is that the listview does not execute the databound event if the datasource is empty or there is a timing issue.
– Tim_007
Nov 23 '18 at 3:47
However, your recommendation helped me come up with a backdoor solution. I did use a updatepanel and 2 separate listviews, each nested in a division. I toggle between the divisions depending if the listview is empty or not. For some reason, the timing on making the div visible or not is accurate, similiar to the label, even though the InsertItemPosition did not get updated properly using this same method.
– Tim_007
Nov 23 '18 at 3:47
add a comment |
Thank you for the suggestion. Unfortunately, I ran into a similar issue where it would work initially, then not work. I believe there may be an error with my logic when I delete the one existing row. My assumption is that the listview does not execute the databound event if the datasource is empty or there is a timing issue.
– Tim_007
Nov 23 '18 at 3:47
However, your recommendation helped me come up with a backdoor solution. I did use a updatepanel and 2 separate listviews, each nested in a division. I toggle between the divisions depending if the listview is empty or not. For some reason, the timing on making the div visible or not is accurate, similiar to the label, even though the InsertItemPosition did not get updated properly using this same method.
– Tim_007
Nov 23 '18 at 3:47
Thank you for the suggestion. Unfortunately, I ran into a similar issue where it would work initially, then not work. I believe there may be an error with my logic when I delete the one existing row. My assumption is that the listview does not execute the databound event if the datasource is empty or there is a timing issue.
– Tim_007
Nov 23 '18 at 3:47
Thank you for the suggestion. Unfortunately, I ran into a similar issue where it would work initially, then not work. I believe there may be an error with my logic when I delete the one existing row. My assumption is that the listview does not execute the databound event if the datasource is empty or there is a timing issue.
– Tim_007
Nov 23 '18 at 3:47
However, your recommendation helped me come up with a backdoor solution. I did use a updatepanel and 2 separate listviews, each nested in a division. I toggle between the divisions depending if the listview is empty or not. For some reason, the timing on making the div visible or not is accurate, similiar to the label, even though the InsertItemPosition did not get updated properly using this same method.
– Tim_007
Nov 23 '18 at 3:47
However, your recommendation helped me come up with a backdoor solution. I did use a updatepanel and 2 separate listviews, each nested in a division. I toggle between the divisions depending if the listview is empty or not. For some reason, the timing on making the div visible or not is accurate, similiar to the label, even though the InsertItemPosition did not get updated properly using this same method.
– Tim_007
Nov 23 '18 at 3:47
add a comment |
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