Bindingsource Find method
in [Compact Framework]
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From: Ginny Caughey [MVP] on 21 Jun 2006 13:49 Mark, What if you just set the DataSource to the new result set? Or use a DataTable instead of a result set? -- Ginny Caughey ..NET Compact Framework MVP "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message news:yefmg.23811$UQ2.22061(a)beryl... > Ginny, > > I tried that, but setting the bindingresource to null resulst in an > ArgumentException without an errormessage ( the source assembly cannot be > found). > > Mark > > "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in > bericht news:%236F1$IVlGHA.3396(a)TK2MSFTNGP05.phx.gbl... >> Mark, >> >> Probably the best way would be to set the BindingSource.DataSource to >> null, then set it back to your new resultset. >> >> -- >> Ginny Caughey >> .NET Compact Framework MVP >> >> >> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >> news:6%dmg.22179$UQ2.2647(a)beryl... >>> Ginny, >>> >>> Ok, that is too bad. I have tried to achieve something similar by using >>> the sqlceresult seek method, however I then have no idea of how to >>> update the bindingsource so that my controls show the correct record. Is >>> this at all possible ? >>> >>> thanx, >>> >>> Mark >>> >>> >>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >>> bericht news:u$MjhaUlGHA.3816(a)TK2MSFTNGP02.phx.gbl... >>>> Mark, >>>> >>>> I think it's probably a limitation of the SqlCeResultSet since it >>>> doesn't contain the actual data and only maintains pointers to the data >>>> (unlike DataSet). Similarly Sort is also not supported I believe. >>>> >>>> -- >>>> Ginny Caughey >>>> .NET Compact Framework MVP >>>> >>>> >>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>> news:_Tcmg.19470$UQ2.9875(a)beryl... >>>>> Bindingsource.find(..) doesn't seem to work on a bindingsource with as >>>>> datasource a sqlceresultset.resultview. As far as I can tell this is >>>>> odd since the sqlceresultset.resultview does implement IBindingList. >>>>> Or is this a limitation of the compactframework ? >>>>> >>>>> Mark. >>>>> >>>> >>>> >>> >>> >> >> > >
From: Mark Huisinga on 22 Jun 2006 02:56 Hi Ginny, Actually there is no "new" resultset. What I'm doing is when the user enters a categoryid in the lostfocus event of the textbox I do a seek on the resultset. If a category id is found I want to update the bindingsource to the same position as the resultset. I prefer the sqlceresultset because it is faster on the device with large tables. Mark "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in bericht news:eWgTxsVlGHA.3528(a)TK2MSFTNGP02.phx.gbl... > Mark, > > What if you just set the DataSource to the new result set? Or use a > DataTable instead of a result set? > > -- > Ginny Caughey > .NET Compact Framework MVP > > > "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message > news:yefmg.23811$UQ2.22061(a)beryl... >> Ginny, >> >> I tried that, but setting the bindingresource to null resulst in an >> ArgumentException without an errormessage ( the source assembly cannot be >> found). >> >> Mark >> >> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >> bericht news:%236F1$IVlGHA.3396(a)TK2MSFTNGP05.phx.gbl... >>> Mark, >>> >>> Probably the best way would be to set the BindingSource.DataSource to >>> null, then set it back to your new resultset. >>> >>> -- >>> Ginny Caughey >>> .NET Compact Framework MVP >>> >>> >>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>> news:6%dmg.22179$UQ2.2647(a)beryl... >>>> Ginny, >>>> >>>> Ok, that is too bad. I have tried to achieve something similar by using >>>> the sqlceresult seek method, however I then have no idea of how to >>>> update the bindingsource so that my controls show the correct record. >>>> Is this at all possible ? >>>> >>>> thanx, >>>> >>>> Mark >>>> >>>> >>>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >>>> bericht news:u$MjhaUlGHA.3816(a)TK2MSFTNGP02.phx.gbl... >>>>> Mark, >>>>> >>>>> I think it's probably a limitation of the SqlCeResultSet since it >>>>> doesn't contain the actual data and only maintains pointers to the >>>>> data (unlike DataSet). Similarly Sort is also not supported I believe. >>>>> >>>>> -- >>>>> Ginny Caughey >>>>> .NET Compact Framework MVP >>>>> >>>>> >>>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>>> news:_Tcmg.19470$UQ2.9875(a)beryl... >>>>>> Bindingsource.find(..) doesn't seem to work on a bindingsource with >>>>>> as datasource a sqlceresultset.resultview. As far as I can tell this >>>>>> is odd since the sqlceresultset.resultview does implement >>>>>> IBindingList. Or is this a limitation of the compactframework ? >>>>>> >>>>>> Mark. >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
From: Ginny Caughey [MVP] on 22 Jun 2006 07:18 Mark, If you have a *small* sample of code that illustrates what you're trying to do I'll be glad to have a look at it. I also prefer SqlCeResultSet not only for speed but also because it's generally a lot easier to use, but I haven't run into the problem you're describing so I'm curious exactly what you're doing. -- Ginny Caughey ..NET Compact Framework MVP "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message news:Farmg.32173$UQ2.12865(a)beryl... > Hi Ginny, > > Actually there is no "new" resultset. What I'm doing is when the user > enters a categoryid in the lostfocus event of the textbox I do a seek on > the resultset. If a category id is found I want to update the > bindingsource to the same position as the resultset. > > I prefer the sqlceresultset because it is faster on the device with large > tables. > > Mark > > "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in > bericht news:eWgTxsVlGHA.3528(a)TK2MSFTNGP02.phx.gbl... >> Mark, >> >> What if you just set the DataSource to the new result set? Or use a >> DataTable instead of a result set? >> >> -- >> Ginny Caughey >> .NET Compact Framework MVP >> >> >> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >> news:yefmg.23811$UQ2.22061(a)beryl... >>> Ginny, >>> >>> I tried that, but setting the bindingresource to null resulst in an >>> ArgumentException without an errormessage ( the source assembly cannot >>> be found). >>> >>> Mark >>> >>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >>> bericht news:%236F1$IVlGHA.3396(a)TK2MSFTNGP05.phx.gbl... >>>> Mark, >>>> >>>> Probably the best way would be to set the BindingSource.DataSource to >>>> null, then set it back to your new resultset. >>>> >>>> -- >>>> Ginny Caughey >>>> .NET Compact Framework MVP >>>> >>>> >>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>> news:6%dmg.22179$UQ2.2647(a)beryl... >>>>> Ginny, >>>>> >>>>> Ok, that is too bad. I have tried to achieve something similar by >>>>> using the sqlceresult seek method, however I then have no idea of how >>>>> to update the bindingsource so that my controls show the correct >>>>> record. Is this at all possible ? >>>>> >>>>> thanx, >>>>> >>>>> Mark >>>>> >>>>> >>>>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >>>>> bericht news:u$MjhaUlGHA.3816(a)TK2MSFTNGP02.phx.gbl... >>>>>> Mark, >>>>>> >>>>>> I think it's probably a limitation of the SqlCeResultSet since it >>>>>> doesn't contain the actual data and only maintains pointers to the >>>>>> data (unlike DataSet). Similarly Sort is also not supported I >>>>>> believe. >>>>>> >>>>>> -- >>>>>> Ginny Caughey >>>>>> .NET Compact Framework MVP >>>>>> >>>>>> >>>>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>>>> news:_Tcmg.19470$UQ2.9875(a)beryl... >>>>>>> Bindingsource.find(..) doesn't seem to work on a bindingsource with >>>>>>> as datasource a sqlceresultset.resultview. As far as I can tell this >>>>>>> is odd since the sqlceresultset.resultview does implement >>>>>>> IBindingList. Or is this a limitation of the compactframework ? >>>>>>> >>>>>>> Mark. >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
From: Mark Huisinga on 22 Jun 2006 08:06 categoriesResultSet is generated.(Northwind). categoriesResulstSet set to Detail in the Data Sources then dragged onto a form. call Addnew, Then type exisiting CategoryID in Category ID Text Box. Now I want to retrieve the corresponding record and position the BindingSource on the corresponding record. private void Form1_Load(object sender, EventArgs e) { categoriesResultSet = new DeviceApplication3.CategoriesResultsetResultSets.CategoriesResultSet(); categoriesResultSet.Bind(this.categoriesResultSetBindingSource); } private void btnAddnew_Click(object sender, EventArgs e) { categoriesResultSetBindingSource.AddNew(); } private void category_IDTextBox_LostFocus(object sender, EventArgs e) { // solution 1 if (categoriesResultSetBindingSource.SupportsSearching == false) { // too bad, this whould have made life easy MessageBox.Show("No search support"); } // solution 2 // try seek but doesn't work if (categoriesResultSet.Seek(System.Data.SqlServerCe.DbSeekOptions.FirstEqual, new object[] { category_IDTextBox.Text })) { categoriesResultSet.Read(); categoriesResultSetBindingSource.DataSource = categoriesResultSet.ResultSetView; } // solution 3 // this also doesn't work. Presumably pass the record as parameter, but how to get record ? int index = categoriesResultSetBindingSource.IndexOf(category_IDTextBox.Text); if (index > 0) { categoriesResultSetBindingSource.Position = index; } } Hope this sheds some light on it. Mark "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in bericht news:Ouv5r2elGHA.4308(a)TK2MSFTNGP05.phx.gbl... > Mark, > > If you have a *small* sample of code that illustrates what you're trying > to do I'll be glad to have a look at it. I also prefer SqlCeResultSet not > only for speed but also because it's generally a lot easier to use, but I > haven't run into the problem you're describing so I'm curious exactly what > you're doing. > > -- > Ginny Caughey > .NET Compact Framework MVP > > > "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message > news:Farmg.32173$UQ2.12865(a)beryl... >> Hi Ginny, >> >> Actually there is no "new" resultset. What I'm doing is when the user >> enters a categoryid in the lostfocus event of the textbox I do a seek on >> the resultset. If a category id is found I want to update the >> bindingsource to the same position as the resultset. >> >> I prefer the sqlceresultset because it is faster on the device with large >> tables. >> >> Mark >> >> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >> bericht news:eWgTxsVlGHA.3528(a)TK2MSFTNGP02.phx.gbl... >>> Mark, >>> >>> What if you just set the DataSource to the new result set? Or use a >>> DataTable instead of a result set? >>> >>> -- >>> Ginny Caughey >>> .NET Compact Framework MVP >>> >>> >>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>> news:yefmg.23811$UQ2.22061(a)beryl... >>>> Ginny, >>>> >>>> I tried that, but setting the bindingresource to null resulst in an >>>> ArgumentException without an errormessage ( the source assembly cannot >>>> be found). >>>> >>>> Mark >>>> >>>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >>>> bericht news:%236F1$IVlGHA.3396(a)TK2MSFTNGP05.phx.gbl... >>>>> Mark, >>>>> >>>>> Probably the best way would be to set the BindingSource.DataSource to >>>>> null, then set it back to your new resultset. >>>>> >>>>> -- >>>>> Ginny Caughey >>>>> .NET Compact Framework MVP >>>>> >>>>> >>>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>>> news:6%dmg.22179$UQ2.2647(a)beryl... >>>>>> Ginny, >>>>>> >>>>>> Ok, that is too bad. I have tried to achieve something similar by >>>>>> using the sqlceresult seek method, however I then have no idea of how >>>>>> to update the bindingsource so that my controls show the correct >>>>>> record. Is this at all possible ? >>>>>> >>>>>> thanx, >>>>>> >>>>>> Mark >>>>>> >>>>>> >>>>>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef >>>>>> in bericht news:u$MjhaUlGHA.3816(a)TK2MSFTNGP02.phx.gbl... >>>>>>> Mark, >>>>>>> >>>>>>> I think it's probably a limitation of the SqlCeResultSet since it >>>>>>> doesn't contain the actual data and only maintains pointers to the >>>>>>> data (unlike DataSet). Similarly Sort is also not supported I >>>>>>> believe. >>>>>>> >>>>>>> -- >>>>>>> Ginny Caughey >>>>>>> .NET Compact Framework MVP >>>>>>> >>>>>>> >>>>>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>>>>> news:_Tcmg.19470$UQ2.9875(a)beryl... >>>>>>>> Bindingsource.find(..) doesn't seem to work on a bindingsource with >>>>>>>> as datasource a sqlceresultset.resultview. As far as I can tell >>>>>>>> this is odd since the sqlceresultset.resultview does implement >>>>>>>> IBindingList. Or is this a limitation of the compactframework ? >>>>>>>> >>>>>>>> Mark. >>>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
From: Ilya Tumanov [MS] on 22 Jun 2006 15:39 RS does not have any data inside, so you can not use Find(), IndexOf() and so on - there's no data to find or compare against. The idea of RS is what if you need to find something, SQL Mobile should do that. So please construct another SQL query and execute new RS. If that does not fit your pattern, please use DataSet which loads all the data to allow for Find(). -- Best regards, Ilya This posting is provided "AS IS" with no warranties, and confers no rights. *** Want to find answers instantly? Here's how... *** 1. Go to http://groups-beta.google.com/group/microsoft.public.dotnet.framework.compactframework?hl=en 2. Type your question in the text box near "Search this group" button. 3. Hit "Search this group" button. 4. Read answer(s). "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message news:nJvmg.33352$UQ2.4279(a)beryl... > categoriesResultSet is generated.(Northwind). > categoriesResulstSet set to Detail in the Data Sources then dragged onto a > form. > > call Addnew, Then type exisiting CategoryID in Category ID Text Box. Now I > want to retrieve the corresponding record and position the BindingSource > on the corresponding record. > > private void Form1_Load(object sender, EventArgs e) > { > categoriesResultSet = new > DeviceApplication3.CategoriesResultsetResultSets.CategoriesResultSet(); > categoriesResultSet.Bind(this.categoriesResultSetBindingSource); > } > > private void btnAddnew_Click(object sender, EventArgs e) > { > categoriesResultSetBindingSource.AddNew(); > } > > private void category_IDTextBox_LostFocus(object sender, EventArgs e) > { > // solution 1 > if (categoriesResultSetBindingSource.SupportsSearching == false) > { > // too bad, this whould have made life easy > MessageBox.Show("No search support"); > } > > // solution 2 > // try seek but doesn't work > if > (categoriesResultSet.Seek(System.Data.SqlServerCe.DbSeekOptions.FirstEqual, > new object[] { category_IDTextBox.Text })) > { > categoriesResultSet.Read(); > categoriesResultSetBindingSource.DataSource = > categoriesResultSet.ResultSetView; > } > > // solution 3 > // this also doesn't work. Presumably pass the record as parameter, but > how to get record ? > int index = > categoriesResultSetBindingSource.IndexOf(category_IDTextBox.Text); > if (index > 0) > { > categoriesResultSetBindingSource.Position = index; > } > } > > Hope this sheds some light on it. > > Mark > > "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in > bericht news:Ouv5r2elGHA.4308(a)TK2MSFTNGP05.phx.gbl... >> Mark, >> >> If you have a *small* sample of code that illustrates what you're trying >> to do I'll be glad to have a look at it. I also prefer SqlCeResultSet not >> only for speed but also because it's generally a lot easier to use, but I >> haven't run into the problem you're describing so I'm curious exactly >> what you're doing. >> >> -- >> Ginny Caughey >> .NET Compact Framework MVP >> >> >> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >> news:Farmg.32173$UQ2.12865(a)beryl... >>> Hi Ginny, >>> >>> Actually there is no "new" resultset. What I'm doing is when the user >>> enters a categoryid in the lostfocus event of the textbox I do a seek on >>> the resultset. If a category id is found I want to update the >>> bindingsource to the same position as the resultset. >>> >>> I prefer the sqlceresultset because it is faster on the device with >>> large tables. >>> >>> Mark >>> >>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >>> bericht news:eWgTxsVlGHA.3528(a)TK2MSFTNGP02.phx.gbl... >>>> Mark, >>>> >>>> What if you just set the DataSource to the new result set? Or use a >>>> DataTable instead of a result set? >>>> >>>> -- >>>> Ginny Caughey >>>> .NET Compact Framework MVP >>>> >>>> >>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>> news:yefmg.23811$UQ2.22061(a)beryl... >>>>> Ginny, >>>>> >>>>> I tried that, but setting the bindingresource to null resulst in an >>>>> ArgumentException without an errormessage ( the source assembly cannot >>>>> be found). >>>>> >>>>> Mark >>>>> >>>>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef in >>>>> bericht news:%236F1$IVlGHA.3396(a)TK2MSFTNGP05.phx.gbl... >>>>>> Mark, >>>>>> >>>>>> Probably the best way would be to set the BindingSource.DataSource to >>>>>> null, then set it back to your new resultset. >>>>>> >>>>>> -- >>>>>> Ginny Caughey >>>>>> .NET Compact Framework MVP >>>>>> >>>>>> >>>>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>>>> news:6%dmg.22179$UQ2.2647(a)beryl... >>>>>>> Ginny, >>>>>>> >>>>>>> Ok, that is too bad. I have tried to achieve something similar by >>>>>>> using the sqlceresult seek method, however I then have no idea of >>>>>>> how to update the bindingsource so that my controls show the correct >>>>>>> record. Is this at all possible ? >>>>>>> >>>>>>> thanx, >>>>>>> >>>>>>> Mark >>>>>>> >>>>>>> >>>>>>> "Ginny Caughey [MVP]" <ginny.caughey.online(a)wasteworks.com> schreef >>>>>>> in bericht news:u$MjhaUlGHA.3816(a)TK2MSFTNGP02.phx.gbl... >>>>>>>> Mark, >>>>>>>> >>>>>>>> I think it's probably a limitation of the SqlCeResultSet since it >>>>>>>> doesn't contain the actual data and only maintains pointers to the >>>>>>>> data (unlike DataSet). Similarly Sort is also not supported I >>>>>>>> believe. >>>>>>>> >>>>>>>> -- >>>>>>>> Ginny Caughey >>>>>>>> .NET Compact Framework MVP >>>>>>>> >>>>>>>> >>>>>>>> "Mark Huisinga" <mhuisinga(a)newsgroups.nospam> wrote in message >>>>>>>> news:_Tcmg.19470$UQ2.9875(a)beryl... >>>>>>>>> Bindingsource.find(..) doesn't seem to work on a bindingsource >>>>>>>>> with as datasource a sqlceresultset.resultview. As far as I can >>>>>>>>> tell this is odd since the sqlceresultset.resultview does >>>>>>>>> implement IBindingList. Or is this a limitation of the >>>>>>>>> compactframework ? >>>>>>>>> >>>>>>>>> Mark. >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
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