5.7 How do I prevent a click into the grid highlighting a cell? |
Here is a technique for binding an arraylist of objects where the objects contain public property that can appear as columns in the datagrid. In this example, the object contains 2 public doubles, one named value and the other named sqrt. To bind this arraylist to a datagrid, add a custom tablestyle that has a MappingName of "ArrayList", and then use the property names as the MappingName for each column. Below are some code snippets. You can download a working project that also has code to delete rows and add new rows to the bound arraylist. |
| private void Form1_Load(object sender, System.EventArgs e)
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| {
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| CreateArrayList();
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| BindArrayListToGrid();
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| }
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| private void BindArrayListToGrid()
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| {
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| dataGrid1.DataSource = arrayList1;
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| //create a custom tablestyle and add two columnstyles
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| DataGridTableStyle ts = new DataGridTableStyle();
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| ts.MappingName = "ArrayList";
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| int colwidth = (dataGrid1.ClientSize.Width - ts.RowHeaderWidth - SystemInformation.VerticalScrollBarWidth - 5) / 2;
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| //create a column for the value property
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| DataGridTextBoxColumn cs = new DataGridTextBoxColumn();
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| cs.MappingName = "value"; //public property name
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| cs.HeaderText = "Random Number";
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| cs.Format = "f4";
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| cs.Width = colwidth;
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| ts.GridColumnStyles.Add(cs);
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| //create a column for the sqrt property
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| cs = new DataGridTextBoxColumn();
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| cs.MappingName = "sqrt"; //public property name
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| cs.HeaderText = "Square Root";
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| cs.Format = "f4";
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| cs.Width = colwidth;
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| ts.GridColumnStyles.Add(cs);
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| dataGrid1.TableStyles.Clear();
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| dataGrid1.TableStyles.Add(ts);
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| }
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| private void CreateArrayList()
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| {
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| arrayList1 = new ArrayList();
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| //add some items
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| Random r = new Random();
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| for (int i = 0; i < 20; ++i)
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| arrayList1.Add(new RandomNumber(r.NextDouble()));
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| }
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| //create a struct or class that defines what you want in each row
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| //the different columns in the row must be public properties
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| public struct RandomNumber
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| {
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| private double number;
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| public RandomNumber(double d)
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| {
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| number = d;
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| }
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| public double value
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| {
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| get{ return number; }
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| set{ number = value;}
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| }
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| public double sqrt
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| {
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| get {return Math.Sqrt(this.value);}
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| }
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| } |
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