Hello,
in my aspx page I have the followong code:
<asp:Repeater id="Repeater1" runat="server">
<ItemTemplate >
....
<%# Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst")) %>
....
</ItemTemplate>
</asp:Repeater>
Whereby "tekst" one of the columns is being loaded in the dataset
In the code behind page data is loaded as as follows:
....
meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
ds = m.GetMeetingByI D(meetingID);
dr = ds.Tables[0].Rows[0];
DataView dv = new DataView(ds.Tab les[0]);
this.Repeater1. DataSource = dv;
this.Repeater1. DataBind();
....
The problem is that column "tekst" can be null.
In that case, I'm getting an error on
<%# Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst")) %>
because the (string) cast then goes wrong. If "tekst" is not null, it is ok.
Now this is just for "tekst", but also other columns in my table could be
null.
How can I deal with this is a nice way?
Eddy de Boer 11  34540 
You should test for null using IsDBNull(object ) prior to allowing the value
in question to be used in your repeater.
"eddy de boer" <ed********@dis cussions.micros oft.com> wrote in message
news:0F******** *************** ***********@mic rosoft.com... Hello,
in my aspx page I have the followong code:
<asp:Repeater id="Repeater1" runat="server">
<ItemTemplate >
...
<%# Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%>
...
</ItemTemplate>
</asp:Repeater>
Whereby "tekst" one of the columns is being loaded in the dataset
In the code behind page data is loaded as as follows:
...
meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
ds = m.GetMeetingByI D(meetingID);
dr = ds.Tables[0].Rows[0];
DataView dv = new DataView(ds.Tab les[0]);
this.Repeater1. DataSource = dv;
this.Repeater1. DataBind();
...
The problem is that column "tekst" can be null.
In that case, I'm getting an error on
<%# Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%>
because the (string) cast then goes wrong. If "tekst" is not null, it is
ok.
Now this is just for "tekst", but also other columns in my table could be
null.
How can I deal with this is a nice way?
Eddy de Boer
Thank you for your answer.
But how would I do that?
Because if it is null, is it your intention to replace it with "" in case of
a strng and a 0 in case of a integer?
Then I should put the following code in the code behind like:
....
for each (Column cl in ds.Tables[i].Rows[j].Columns) )
{
if (cl.IsDBnull(cl ))
{
if (cl.Type == DataType.Intege r)
{
cl.Value = 0;
}
....
}
ds.ApplyUpdates ()
something like this?
Or is there another way?
"Scott M." wrote: You should test for null using IsDBNull(object ) prior to allowing the value
in question to be used in your repeater.
"eddy de boer" <ed********@dis cussions.micros oft.com> wrote in message
news:0F******** *************** ***********@mic rosoft.com... Hello,
in my aspx page I have the followong code:
<asp:Repeater id="Repeater1" runat="server">
<ItemTemplate >
...
<%# Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%>
...
</ItemTemplate>
</asp:Repeater>
Whereby "tekst" one of the columns is being loaded in the dataset
In the code behind page data is loaded as as follows:
...
meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
ds = m.GetMeetingByI D(meetingID);
dr = ds.Tables[0].Rows[0];
DataView dv = new DataView(ds.Tab les[0]);
this.Repeater1. DataSource = dv;
this.Repeater1. DataBind();
...
The problem is that column "tekst" can be null.
In that case, I'm getting an error on
<%# Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%>
because the (string) cast then goes wrong. If "tekst" is not null, it is
ok.
Now this is just for "tekst", but also other columns in my table could be
null.
How can I deal with this is a nice way?
Eddy de Boer
Write a function in the code-behind and call the function (instead of
Server.HtmlDeco de) with the column parameters, the function can check if it
is a null (int or string) and return what you want, else the function calls
Server.HtmlDeco de.
Your idea of going through the table and change the nulls will work as well.
"eddy de boer" <ed********@dis cussions.micros oft.com> wrote in message
news:62******** *************** ***********@mic rosoft.com... Thank you for your answer.
But how would I do that?
Because if it is null, is it your intention to replace it with "" in case
of
a strng and a 0 in case of a integer?
Then I should put the following code in the code behind like:
...
for each (Column cl in ds.Tables[i].Rows[j].Columns) )
{
if (cl.IsDBnull(cl ))
{
if (cl.Type == DataType.Intege r)
{
cl.Value = 0;
}
....
}
ds.ApplyUpdates ()
something like this?
Or is there another way?
"Scott M." wrote:
You should test for null using IsDBNull(object ) prior to allowing the
value
in question to be used in your repeater.
"eddy de boer" <ed********@dis cussions.micros oft.com> wrote in message
news:0F******** *************** ***********@mic rosoft.com... > Hello,
>
> in my aspx page I have the followong code:
>
> <asp:Repeater id="Repeater1" runat="server">
> <ItemTemplate >
> ...
> <%#
> Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
> %>
> ...
> </ItemTemplate>
> </asp:Repeater>
>
> Whereby "tekst" one of the columns is being loaded in the dataset
> In the code behind page data is loaded as as follows:
>
> ...
> meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
> ds = m.GetMeetingByI D(meetingID);
> dr = ds.Tables[0].Rows[0];
> DataView dv = new DataView(ds.Tab les[0]);
> this.Repeater1. DataSource = dv;
> this.Repeater1. DataBind();
> ...
>
> The problem is that column "tekst" can be null.
> In that case, I'm getting an error on
> <%#
> Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
> %>
> because the (string) cast then goes wrong. If "tekst" is not null, it
> is
> ok.
>
> Now this is just for "tekst", but also other columns in my table could
> be
> null.
> How can I deal with this is a nice way?
>
> Eddy de Boer
>
>
Sorry, to elaborate, instead of having
<%#
Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%>
then you have
<%#
MyFunction(Cont ainer.DataItem, "tekst")
%>
"Chris Botha" <ch***********@ AThotmail.com> wrote in message
news:Oo******** ******@TK2MSFTN GP12.phx.gbl... Write a function in the code-behind and call the function (instead of
Server.HtmlDeco de) with the column parameters, the function can check if
it is a null (int or string) and return what you want, else the function
calls Server.HtmlDeco de.
Your idea of going through the table and change the nulls will work as
well.
"eddy de boer" <ed********@dis cussions.micros oft.com> wrote in message
news:62******** *************** ***********@mic rosoft.com... Thank you for your answer.
But how would I do that?
Because if it is null, is it your intention to replace it with "" in case
of
a strng and a 0 in case of a integer?
Then I should put the following code in the code behind like:
...
for each (Column cl in ds.Tables[i].Rows[j].Columns) )
{
if (cl.IsDBnull(cl ))
{
if (cl.Type == DataType.Intege r)
{
cl.Value = 0;
}
....
}
ds.ApplyUpdates ()
something like this?
Or is there another way?
"Scott M." wrote:
You should test for null using IsDBNull(object ) prior to allowing the
value
in question to be used in your repeater.
"eddy de boer" <ed********@dis cussions.micros oft.com> wrote in message
news:0F******** *************** ***********@mic rosoft.com...
> Hello,
>
> in my aspx page I have the followong code:
>
> <asp:Repeater id="Repeater1" runat="server">
> <ItemTemplate >
> ...
> <%#
> Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
> %>
> ...
> </ItemTemplate>
> </asp:Repeater>
>
> Whereby "tekst" one of the columns is being loaded in the dataset
> In the code behind page data is loaded as as follows:
>
> ...
> meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
> ds = m.GetMeetingByI D(meetingID);
> dr = ds.Tables[0].Rows[0];
> DataView dv = new DataView(ds.Tab les[0]);
> this.Repeater1. DataSource = dv;
> this.Repeater1. DataBind();
> ...
>
> The problem is that column "tekst" can be null.
> In that case, I'm getting an error on
> <%#
> Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
> %>
> because the (string) cast then goes wrong. If "tekst" is not null, it
> is
> ok.
>
> Now this is just for "tekst", but also other columns in my table could
> be
> null.
> How can I deal with this is a nice way?
>
> Eddy de Boer
>
>
Thank you for your answer!
"Chris Botha" wrote: Sorry, to elaborate, instead of having
<%#
Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%>
then you have
<%#
MyFunction(Cont ainer.DataItem, "tekst")
%>
"Chris Botha" <ch***********@ AThotmail.com> wrote in message
news:Oo******** ******@TK2MSFTN GP12.phx.gbl... Write a function in the code-behind and call the function (instead of
Server.HtmlDeco de) with the column parameters, the function can check if
it is a null (int or string) and return what you want, else the function
calls Server.HtmlDeco de.
Your idea of going through the table and change the nulls will work as
well.
"eddy de boer" <ed********@dis cussions.micros oft.com> wrote in message
news:62******** *************** ***********@mic rosoft.com... Thank you for your answer.
But how would I do that?
Because if it is null, is it your intention to replace it with "" in case
of
a strng and a 0 in case of a integer?
Then I should put the following code in the code behind like:
...
for each (Column cl in ds.Tables[i].Rows[j].Columns) )
{
if (cl.IsDBnull(cl ))
{
if (cl.Type == DataType.Intege r)
{
cl.Value = 0;
}
....
}
ds.ApplyUpdates ()
something like this?
Or is there another way?
"Scott M." wrote:
You should test for null using IsDBNull(object ) prior to allowing the
value
in question to be used in your repeater.
"eddy de boer" <ed********@dis cussions.micros oft.com> wrote in message
news:0F******** *************** ***********@mic rosoft.com...
> Hello,
>
> in my aspx page I have the followong code:
>
> <asp:Repeater id="Repeater1" runat="server">
> <ItemTemplate >
> ...
> <%#
> Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
> %>
> ...
> </ItemTemplate>
> </asp:Repeater>
>
> Whereby "tekst" one of the columns is being loaded in the dataset
> In the code behind page data is loaded as as follows:
>
> ...
> meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
> ds = m.GetMeetingByI D(meetingID);
> dr = ds.Tables[0].Rows[0];
> DataView dv = new DataView(ds.Tab les[0]);
> this.Repeater1. DataSource = dv;
> this.Repeater1. DataBind();
> ...
>
> The problem is that column "tekst" can be null.
> In that case, I'm getting an error on
> <%#
> Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
> %>
> because the (string) cast then goes wrong. If "tekst" is not null, it
> is
> ok.
>
> Now this is just for "tekst", but also other columns in my table could
> be
> null.
> How can I deal with this is a nice way?
>
> Eddy de Boer
>
>
If you are using a typed dataset you can set a property of the column
called NullValue and have it come back with a default value (which is a
empty string)
=?Utf-8?B?ZWRkeSBkZSB ib2Vy?= <ed********@dis cussions.micros oft.com>
wrote in news:0F******** *************** ***********@mic rosoft.com: Hello,
in my aspx page I have the followong code:
<asp:Repeater id="Repeater1" runat="server">
<ItemTemplate >
...
<%#
Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%> ...
</ItemTemplate>
</asp:Repeater>
Whereby "tekst" one of the columns is being loaded in the dataset
In the code behind page data is loaded as as follows:
...
meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
ds = m.GetMeetingByI D(meetingID);
dr = ds.Tables[0].Rows[0];
DataView dv = new DataView(ds.Tab les[0]);
this.Repeater1. DataSource = dv;
this.Repeater1. DataBind();
...
The problem is that column "tekst" can be null.
In that case, I'm getting an error on
<%#
Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%> because the (string) cast then goes wrong. If "tekst" is not null,
it is ok.
Now this is just for "tekst", but also other columns in my table could
be null.
How can I deal with this is a nice way?
Eddy de Boer
Thank you for your response.
I don't know how to create a strong typed dataset, I will show you how I get
my data.
I'm using the folling DataHandler to get my data:
using System;
using System.Data;
using System.Data.Sql Client;
using System.Configur ation;
namespace meetmate.DataLa yer
{
/// <summary>
/// Summary description for DataHandler.
/// </summary>
public class DataHandler
{
private SqlConnection conn;
private string connectionStrin g;
public DataHandler()
{
connectionStrin g = ConfigurationSe ttings.AppSetti ngs["connectionStri ng"];
conn = new SqlConnection(c onnectionString );
}
public DataSet GetDataSet(SqlC ommand cmd)
{
cmd.Connection = conn;
SqlDataAdapter da = new SqlDataAdapter( cmd);
DataSet ds = new DataSet();
da.Fill(ds);
return ds;
}
public void ExecuteCommand( SqlCommand cmd)
{
cmd.Connection = conn;
try
{
conn.Open();
cmd.ExecuteNonQ uery();
}
finally
{
conn.Close();
}
}
}
}
In another module I call the Get like this:
public DataSet GetMeetingByID( int meetingID)
{
string qry = "select
titel,datum,tij d_van,tijd_tot, adres,plaats,te kst,verslag " +
"from Meetings " +
"where ID = @ID";
SqlCommand cmd = new SqlCommand(qry) ;
cmd.Parameters. Add(new SqlParameter("@ ID",meetingID)) ;
DataHandler dh = new DataHandler();
DataSet ds = dh.GetDataSet(c md);
return ds;
}
Then, in my BusinessLayer, I call the GetMeetingByID.
Do you know or have a reference how I could use typed DataSet in this?
Thank you,
Eddy
"James Doughty" wrote: If you are using a typed dataset you can set a property of the column
called NullValue and have it come back with a default value (which is a
empty string)
=?Utf-8?B?ZWRkeSBkZSB ib2Vy?= <ed********@dis cussions.micros oft.com>
wrote in news:0F******** *************** ***********@mic rosoft.com:
Hello,
in my aspx page I have the followong code:
<asp:Repeater id="Repeater1" runat="server">
<ItemTemplate >
...
<%#
Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%> ...
</ItemTemplate>
</asp:Repeater>
Whereby "tekst" one of the columns is being loaded in the dataset
In the code behind page data is loaded as as follows:
...
meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
ds = m.GetMeetingByI D(meetingID);
dr = ds.Tables[0].Rows[0];
DataView dv = new DataView(ds.Tab les[0]);
this.Repeater1. DataSource = dv;
this.Repeater1. DataBind();
...
The problem is that column "tekst" can be null.
In that case, I'm getting an error on
<%#
Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"))
%> because the (string) cast then goes wrong. If "tekst" is not null,
it is ok.
Now this is just for "tekst", but also other columns in my table could
be null.
How can I deal with this is a nice way?
Eddy de Boer
<%#
Server.HtmlDeco de(IsDBNull(Dat aBinder.Eval(Co ntainer.DataIte m,"tekst"))
? "" : (string) DataBinder.Eval (Container.Data Item,"tekst")) %>
Take a look at http://msdn.microsoft.com/library/default.asp?
url=/library/en-us/dnhcvb03/html/vb03f9.asp
If you have any questions or don't understand something about let me
know.
=?Utf-8?B?ZWRkeSBkZSB ib2Vy?= <ed********@dis cussions.micros oft.com>
wrote in news:AC******** *************** ***********@mic rosoft.com: Thank you for your response.
I don't know how to create a strong typed dataset, I will show you how
I get my data.
I'm using the folling DataHandler to get my data:
using System;
using System.Data;
using System.Data.Sql Client;
using System.Configur ation;
namespace meetmate.DataLa yer
{
/// <summary>
/// Summary description for DataHandler.
/// </summary>
public class DataHandler
{
private SqlConnection conn;
private string connectionStrin g;
public DataHandler()
{
connectionStrin g =
ConfigurationSe ttings.AppSetti ngs["connectionStri ng"];
conn = new SqlConnection(c onnectionString );
}
public DataSet GetDataSet(SqlC ommand cmd)
{
cmd.Connection = conn;
SqlDataAdapter da = new SqlDataAdapter( cmd);
DataSet ds = new DataSet();
da.Fill(ds);
return ds;
}
public void ExecuteCommand( SqlCommand cmd)
{
cmd.Connection = conn;
try
{
conn.Open();
cmd.ExecuteNonQ uery();
}
finally
{
conn.Close();
}
}
}
}
In another module I call the Get like this:
public DataSet GetMeetingByID( int meetingID)
{
string qry = "select
titel,datum,tij d_van,tijd_tot, adres,plaats,te kst,verslag " +
"from Meetings " +
"where ID = @ID";
SqlCommand cmd = new SqlCommand(qry) ;
cmd.Parameters. Add(new SqlParameter("@ ID",meetingID)) ;
DataHandler dh = new DataHandler();
DataSet ds = dh.GetDataSet(c md);
return ds;
}
Then, in my BusinessLayer, I call the GetMeetingByID.
Do you know or have a reference how I could use typed DataSet in this?
Thank you,
Eddy
"James Doughty" wrote:
If you are using a typed dataset you can set a property of the column
called NullValue and have it come back with a default value (which is
a empty string)
=?Utf-8?B?ZWRkeSBkZSB ib2Vy?= <ed********@dis cussions.micros oft.com>
wrote in news:0F******** *************** ***********@mic rosoft.com:
> Hello,
>
> in my aspx page I have the followong code:
>
> <asp:Repeater id="Repeater1" runat="server">
> <ItemTemplate >
> ...
> <%#
> Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"
> )) %> ...
> </ItemTemplate>
> </asp:Repeater>
>
> Whereby "tekst" one of the columns is being loaded in the dataset
> In the code behind page data is loaded as as follows:
>
> ...
> meetmate.DataLa yer.Meetings m = new meetmate.DataLa yer.Meetings();
> ds = m.GetMeetingByI D(meetingID);
> dr = ds.Tables[0].Rows[0];
> DataView dv = new DataView(ds.Tab les[0]);
> this.Repeater1. DataSource = dv;
> this.Repeater1. DataBind();
> ...
>
> The problem is that column "tekst" can be null.
> In that case, I'm getting an error on
> <%#
> Server.HtmlDeco de((string)Data Binder.Eval(Con tainer.DataItem ,"tekst"
> )) %> because the (string) cast then goes wrong. If "tekst" is not
> null, it is ok.
>
> Now this is just for "tekst", but also other columns in my table
> could be null.
> How can I deal with this is a nice way?
>
> Eddy de Boer
>
>
>
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last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
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Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: conductexam |
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I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: bsmnconsultancy |
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In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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