The code that causes the error is:
dataValue = DataBinder.Eval(container.DataItem, _columnName);
The problem is that templatefield has the following name gridview and ColumnName only reads to the point. This explains the error and read only up to the "C".
How can I make it read the whole name, including the period?
Using the common form of DataBinder.Eval does not really work for field names that contain . .
The alternative forms are:
((System.Data.DataRowView)Container.DataItem)["C.json"]
or
DataBinder.GetPropertyValue(Container.DataItem, "C.json")
I particularly find the second form more elegant and simple.
This happens because DataBinder.Eval expects, in the second parameter, a expression to find the name of the column or property of a class. This way, the point influences the resolution of the parameter.
See more details about the DataBinder.Eval method in MSDN .
An example
HTML:
<asp:Repeater ID="ProductList" runat="server">
<ItemTemplate>
O id é: <%# DataBinder.Eval(Container.DataItem, "id") %> <br />
Para o item: <%# DataBinder.Eval(Container.DataItem, "item") %> <br />
Valor com ponto: <%# ((System.Data.DataRowView)Container.DataItem)["C.json"] %> <br />
Outra forma: <%# DataBinder.GetPropertyValue(Container.DataItem, "C.json") %> <br />
<br />
<hr />
</ItemTemplate>
</asp:Repeater>
C # no page_load to fill repeater:
protected void Page_Load(object sender, EventArgs e)
{
var products = new DataTable();
DataRow row;
products.Columns.Add(new DataColumn() { ColumnName = "id" });
products.Columns.Add(new DataColumn() { ColumnName = "item" });
products.Columns.Add(new DataColumn() { ColumnName = "C.json"});
for (int i = 0; i < 10; i++)
{
row = products.NewRow();
row["id"] = i;
row["item"] = "item " + i.ToString();
row["C.json"] = "valor com . no nome";
products.Rows.Add(row);
}
ProductList.DataSource = products;
ProductList.DataBind();
}
The result:
