问题描述
我似乎在绕圈子跑,而且在过去的几个小时里一直在这样做.
I seem to be running around in circles and have been doing so in the last hours.
我想从字符串数组中填充 datagridview.我已经阅读了它不可能直接,并且我需要创建一个自定义类型,将字符串保存为公共属性.所以我做了一个类:
I want to populate a datagridview from an array of strings. I've read its not possible directly, and that I need to create a custom type that holds the string as a public property. So I made a class:
public class FileName
{
private string _value;
public FileName(string pValue)
{
_value = pValue;
}
public string Value
{
get
{
return _value;
}
set { _value = value; }
}
}
这是容器类,它只有一个带有字符串值的属性.我现在想要的是该字符串出现在 datagridview 中,当我将它的数据源绑定到一个列表时.
this is the container class, and it simply has a property with the value of the string. All I want now is that string to appear in the datagridview, when I bind its datasource to a List.
我还有这个方法 BindGrid(),我想用它来填充 datagridview.这是:
Also I have this method, BindGrid() which I want to fill the datagridview with. Here it is:
private void BindGrid()
{
gvFilesOnServer.AutoGenerateColumns = false;
//create the column programatically
DataGridViewTextBoxColumn colFileName = new DataGridViewTextBoxColumn();
DataGridViewCell cell = new DataGridViewTextBoxCell();
colFileName.CellTemplate = cell; colFileName.Name = "Value";
colFileName.HeaderText = "File Name";
colFileName.ValueType = typeof(FileName);
//add the column to the datagridview
gvFilesOnServer.Columns.Add(colFileName);
//fill the string array
string[] filelist = GetFileListOnWebServer();
//try making a List<FileName> from that array
List<FileName> filenamesList = new List<FileName>(filelist.Length);
for (int i = 0; i < filelist.Length; i++)
{
filenamesList.Add(new FileName(filelist[i].ToString()));
}
//try making a bindingsource
BindingSource bs = new BindingSource();
bs.DataSource = typeof(FileName);
foreach (FileName fn in filenamesList)
{
bs.Add(fn);
}
gvFilesOnServer.DataSource = bs;
}
最后,问题:字符串数组填充正常,列表创建正常,但我在datagridview中得到一个空列.我也直接试过datasource=list<>,而不是=bindingsource,还是什么都没有.
Finally, the problem: the string array fills ok, the list is created ok, but I get an empty column in the datagridview. I also tried datasource= list<> directly, instead of = bindingsource, still nothing.
我非常感谢您的建议,这让我发疯了.
I would really appreciate an advice, this has been driving me crazy.
推荐答案
使用 BindingList 并设置 DataPropertyName-列的属性.
Use a BindingList and set the DataPropertyName-Property of the column.
尝试以下操作:
...
private void BindGrid()
{
gvFilesOnServer.AutoGenerateColumns = false;
//create the column programatically
DataGridViewCell cell = new DataGridViewTextBoxCell();
DataGridViewTextBoxColumn colFileName = new DataGridViewTextBoxColumn()
{
CellTemplate = cell,
Name = "Value",
HeaderText = "File Name",
DataPropertyName = "Value" // Tell the column which property of FileName it should use
};
gvFilesOnServer.Columns.Add(colFileName);
var filelist = GetFileListOnWebServer().ToList();
var filenamesList = new BindingList<FileName>(filelist); // <-- BindingList
//Bind BindingList directly to the DataGrid, no need of BindingSource
gvFilesOnServer.DataSource = filenamesList
}
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