datagrcompany infomationsidviewThe Programming Language Quiz, Mark II Cops
DataTable dt; DataSet ds new DataSet; private void InitDataTable if ds.Tables.ContainsGjester dt.Rows.AddgjestenavnInput.Text, datoInnsjekk.Text, antallDager.Text; ds.Mergedt; ds.WriteXmlgjesteInfo.xml; else dt new DataTableGjester; ds.ReadXmlgjesteInfo.xml; ds.Tables.At; DataColumn dc new DataColumnFullt navn; DataColumn dc new DataColumnStart dato; DataColumn dc new DataColumnAntall dager; dt.Columns.Ac; dt.Columns.Ac; dt.Columns.Ac; dt.Rows.AddgjestenavnInput.Text, datoInnsjekk.Text, antallDager.Text; ds.Mergedt; ds.WriteXmlgjesteInfo.xml;
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Please explain more, do I put this method inside the function? And then what?
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DataSet ds new DataSet; private void InitDataTable DataTable dt; ifds.Tables.Count dt ds.Tables; dt new DataTable; //your code
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I try to get out the info stored in the XLM with a DataGridView named lagredeGjester as seen over.
I try to put up an if statement to check if a le is already created. I only want to create one le, but as it is now I create a le every time I click the button to store the info. Any suggestions?
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public static DataTable FetchOrCreatethis DataSet ds, string leName if ds.Tables.ContainsleName return ds.Tables[leName]; // var dt new DataleleName; ds.Tables.At; return dt;
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A possible solution would be to define theDataSetout of the function. Then check number of les in the dataset.
ifds.Tables[lename] // execute something
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DataTable dt; private void InitDataTable if dt new DataTable; DataSet ds new DataSet; ds.ReadXmlgjesteInfo.xml; ds.Tables.At; DataColumn dc new DataColumnFullt navn; DataColumn dc new DataColumnStart dato; DataColumn dc new DataColumnAntall dager; lumns.Ac; dt.Columns.Ac; dt.Columns.Ac; dt.Rows.AddgjestenavnInput.Text, datoInnsjekk.Text, antallDager.Text; rgedt; ds.WriteXmlgjesteInfo.xml; private void lagre_Clickobject sender, EventArgs e InitDataTable; gjesterutenrom.Items.AddgjestenavnInput.Text; gjestenavnInput.Text ; datoInnsjekk.Text ; antallDager.Text ; DataSet onClick new DataSet; onClick.ReadXmlgjesteInfo.xml; lagredeGjester.DataSource onClick.Tables;
int flag try ifds.Tables[lename].Rows.Count // execute something catchException ex flag; ifflag messagebox.showTable does not exists;
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On my first run I entered two different infomations and pressed my button. Both info got in the same le as I wanted it to. But I cant seem to write my if statement correctly. When I run the code above it works with an empty XML with no les, but as long as Gjester le is created it says A DataTable named Gjester already belongs to this DataSet. But isnt this what my if statement should prevent? As I wrote it now, should it not just add the info and not try to create a new le?
You can also Extend DataSet to add a method FetchOrCreate
try last option, i just edited it. MariusMathisen
I still creates a new le. Why the dt ds.Tables?
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MariusMathisen if the dataset has an datale it wont create a new le. It use the existing one.
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I tried you last suggestion, but all I get is Cannot implicitly convert System.Data.DataTable to Bool
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I updated my question. Take a look if you will.