help in creating a xml

[dhol]

I have did a program such that , i will have two text box name and age in my form..and a button..so that when the values entered r in the text box..a xml file is created with those data... and my coding is as follows. Inside the burtton click, th e coding is as follows //create a dataset DataSet dataSet = new DataSet(); //read the schema dataSet.ReadXmlSchema("d:\\Menu.xsd"); //create a new row DataRow newrow; newrow = dataSet.Tables[0].NewRow(); //enter the values newrow[0] = Convert.ToInt32(txtName.Text); newrow[1] = Convert.ToInt32(txtAge.Text); //add the row to the dataset dataSet.Tables[0].Rows.Add(newrow); //write the data to a xml file dataSet.WriteXml("D:\\myData.xml", XmlWriteMode.WriteSchema); MessageBox.Show("saved"); Now i have one doubt.. ie, the program which i did ..now ..in the form...when i am giving data as for name: john age:22... now myData.xml wil be saved with those data ... Now if i am clearing those vaues in th textbox and adding some other data... that should be added without deleting the previous data... and also if i am entering again john..it should show that already it exists.... please say how to do this...

[Judah Gabriel Himango]

Before writing to the XML file, read the existing one into a DataSet. Before writing a new name & age to the XML file, first make sure its not in the dataset. If it is, show a box saying it already exists. That said, if you're going to be storing lots & lots of data like this, I recommend you use a database rather than XML files. XML files are good for configuration, settings, storing discreet, concise bits of information in a human readable format. If that's not what your goals are, you should choose another tool such as a database to store your data.

[dhol]

Hi I have did a program such that , i will have two text box name and age in my form..and a button named save. so that when the values entered r in the text box..a xml file is created with those data... Now I can able to create one set of values…. No what I need is that when again some other value is entered in the textbox. It should also be written in the xml file..but without deleting the other. I mean it should append on the other.. For example: first I entered forst as john and 22 for name and age ..it will added in the xml file..no again if I enter charu and 23 as name and age.. Now xml should have john and 22 as well as charu and 23… And also one more thing is that if I again enter John. It should give a message that it has already been entered. No values should be repeated again. Please help me to do this….. The coding which I did is as follows. In side the button click //save Button private void button1_Click(object sender, System.EventArgs e) { DataSet dataSet = new DataSet(); //read the schema dataSet.ReadXmlSchema("..\\..\\PlaygroMenu.xsd"); //create a new row DataRow oValues; oValues = dataSet.Tables[0].NewRow(); //enter the values oValues[0] = txtName.Text; oValues[1] = Convert.ToInt32(txtAage.Text); //check for duplication bool hasalready = false; foreach(DataRow row in dataSet.Tables[0].Rows) { if(row.ItemArray[0].ToString().Equals(txtID.Text)) { hasalready = true; } } // if(!hasalready) { //add the row to the dataset dataSet.Tables[0].Rows.Add(oValues); //write the data to a xml file dataSet.WriteXml("..\\..\\resultdata.xml", XmlWriteMode.WriteSchema); MessageBox.Show("Saved"); } else { MessageBox.Show("Already Exists"); } } private void Form1_Load(object sender, System.EventArgs e) { DataSet dataSet = new DataSet(); //read the schema dataSet.ReadXmlSchema("..\\..\\Menu.xsd"); System.IO.FileInfo file = new System.IO.FileInfo("..\\..\\mydata.xml"); //check whethere there is result xml file... if (file.Exists) { dataSet.ReadXml("..\\..\\resultdata.xml"); } } Please help me to do this.. Dhol