Question

我在表格上有Devxpress GridControl，
我希望将此网格上的数据发送到excel 我不想用ExportToExcel方法做这个我用Google搜索并找到了这段代码但是此代码用于.Net的DataGrid控件并且它在尝试转换时出错 DevExpress.XtraGrid.Views.Grid.GridView到System.Data.DataView
这是代码

public string LastCoulmLetter(int coulmnCount)
{
        string finalColLetter = string.Empty;
        string colCharset = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        int colCharsetLen = colCharset.Length;

        if (coulmnCount > colCharsetLen)
        {
            finalColLetter = colCharset.Substring(
                (coulmnCount - 1) / colCharsetLen - 1, 1);
        }

        finalColLetter += colCharset.Substring(
                (coulmnCount - 1) % colCharsetLen, 1);

        return finalColLetter;
}


public void FromGridToExcel()
{
        if (gridView1.RowCount <= 0)
            return;
        Excel.Application xls = new Excel.Application();
        Excel.Workbook wb;
        Excel.Worksheet sheet;

        object SalakObje = System.Reflection.Missing.Value;
        wb = xls.Workbooks.Add(SalakObje);
        sheet = (Excel.Worksheet)wb.ActiveSheet;
        sheet.Name = "Result";
        xls.Visible = true;

        DataTable dt = (DataTable)gridView1.DataSource; // Error comes in here

        // Copy the DataTable to an object array
        object[,] rawData = new object[dt.Rows.Count + 1, dt.Columns.Count];

        // Copy the column names to the first row of the object array
        for (int col = 0; col < dt.Columns.Count; col++)
        {
            rawData[0, col] = dt.Columns[col].ColumnName;
        }

        // Copy the values to the object array
        for (int col = 0; col < dt.Columns.Count; col++)
        {
            for (int row = 0; row < dt.Rows.Count; row++)
            {
                rawData[row + 1, col] = dt.Rows[row].ItemArray[col];
            }
        }

        // Fast data export to Excel
        string excelRange = string.Format("A1:{0}{1}",LastCoulmLetter(dt.Columns.Count), dt.Rows.Count + 1);

        sheet.get_Range(excelRange, Type.Missing).Value2 = rawData;

        sheet.get_Range(excelRange).Columns.AutoFit();
}

那么问题是什么以及如何解决它

Answer 1

问题似乎是您的DataSource是DataView，而不是DataTable。

一些选项：

如果您想使用相同的过滤器，请将其投放到DataView：

DataView dv = (DataView)gridView1.DataSource;

如果需要原始数据，请使用.Table属性获取源表：

DataTable dt = ((DataView)gridView1.DataSource).Table;

Answer 2

请改为尝试：

DataTable dt = ((DataView)gridView1.DataSource).Table;

如何解决Unable将类型为'System.Data.DataView'的对象强制转换为'System.Data.DataTable'ERROR

2 个答案: