[英]Export dynamic label text to Excel
我有一个小程序,可以在flowLayoutPanel1
中生成一些动态标签,我试图将这些标签的文本导出到Excel,但是我得到的只是最后一个标签的值。
这是我的出口班:
class Export
{
public Export(bool defaultBackgroundIsWhite)
{
this.defaultBackgroundIsWhite = defaultBackgroundIsWhite;
app = new Application();
app.Visible = true;
workbook = app.Workbooks.Add(1);
worksheet = (Worksheet)workbook.Sheets[1];
}
public void Do(string excelName, System.Windows.Forms.Label names)
{
for (int i = 0; i <= 5; i++)
{
AddNames(i,0,names);
}
}
private void AddNames(int row, int col, System.Windows.Forms.Label lbls)
{
if (lbls == null) return;
row++;
col++;
Range range = worksheet.Cells[row + 2, col + 2];
range.NumberFormat = "";
worksheet.Cells[row + 2, col + 2] = lbls.Text;
row--;
col--;
}
private Application app = null;
private Workbook workbook = null;
private Worksheet worksheet = null;
private bool defaultBackgroundIsWhite;
}
表单类代码:
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
create();
}
Label lbl;
private void create()
{
flowLayoutPanel1.Controls.Clear();
//int length = ds.Tables[0].Rows.Count;
for (int i = 0; i < 5; i++)
{
lbl = new Label();
lbl.Name = i.ToString();
lbl.Text = "Label "+i;
lbl.Font = new Font(FontFamily.GenericSansSerif, 10, FontStyle.Regular);
lbl.SetBounds(0, 20, 100, 25);
lbl.BorderStyle = BorderStyle.FixedSingle;
flowLayoutPanel1.Controls.Add(lbl);
}
}
private void button1_Click(object sender, EventArgs e)
{
Export ep = new Export(true);
ep.Do("test.xsl", lbl);
}
我的结果:
您始终会添加最后创建的标签的文本,因为您仅传递了其引用。 相反,您应该传递带有所有标签的引用的列表,这些标签要将Text属性导出到Excel。 更改这些方法:
List<Label> lbls;
private void create()
{
flowLayoutPanel1.Controls.Clear();
//int length = ds.Tables[0].Rows.Count;
lbls = new List<Labels>();
for (int i = 0; i < 5; i++)
{
Label lbl = new Label();
lbl.Name = i.ToString();
lbl.Text = "Label "+i;
lbl.Font = new Font(FontFamily.GenericSansSerif, 10, FontStyle.Regular);
lbl.SetBounds(0, 20, 100, 25);
lbl.BorderStyle = BorderStyle.FixedSingle;
flowLayoutPanel1.Controls.Add(lbl);
lbls.Add(lbl);
}
}
还要在Export
类中更改方法Do
,以接受List<Label>
而不是Label
:
public void Do(string excelName, List<Label> names)
{
for (int i = 0; i <= names.Count; i++)
{
AddNames(i,0,names[i]);
}
}
List<Label> lbls = new List<Label>();
private void create()
{
flowLayoutPanel1.Controls.Clear();
//int length = ds.Tables[0].Rows.Count;
for (int i = 0; i < 5; i++)
{
lbl = new Label();
lbl.Name = i.ToString();
lbl.Text = "Label "+i;
lbl.Font = new Font(FontFamily.GenericSansSerif, 10, FontStyle.Regular);
lbl.SetBounds(0, 20, 100, 25);
lbl.BorderStyle = BorderStyle.FixedSingle;
lbls.Add(lbl); //< -- add the label to the local list of Labels
flowLayoutPanel1.Controls.Add(lbl);
}
}
private void button1_Click(object sender, EventArgs e)
{
int i = 0;
Export ep = new Export(true);
foreach(var lbl in lbls)
{
i++;
ep.AddNames(i,0,lbl);
}
}
public void AddNames(int row, int col, System.Windows.Forms.Label lbl)
{
if (lbl == null) return;
row++;
col++;
Range range = worksheet.Cells[row + 2, col + 2];
range.NumberFormat = "";
worksheet.Cells[row + 2, col + 2] = lbl.Text;
row--;
col--;
}
您每次都要在create()方法中的for循环周围构造一个新标签,并将该标签分配给同一字段(lbl)。 到您完成时,lbl是您创建的最后一个标签。 如果可以确定只包含您要导出的标签,则可以将标签添加到List中,或将flowLayoutPanel1.Controls传递给go()方法。
TBH有点笨拙,不建议过分依赖于UI的机制-建议您将UI绑定到数据的模型深思熟虑,否则效果会更好。完成了,那是你的问题。
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