[英]Set DataGridView Row Background Image in C# Winform Application
[英]Error on Delete Last row of DataGridview on Winform Application in c#
我正在asp.net的Window應用程序中工作。 我有一個GUI,用戶可以在其中的文本框中輸入產品名稱和數量。 在添加按鈕上,單擊我要在Datagridview中添加新行,並在datagridview列中設置產品名稱和數量的值。 我不在數據庫中插入記錄,而僅在Datatable中保存記錄以及在Datagridview中添加記錄。
問題是,當我從datagridview中選擇最后一行並從鍵盤上按Delete鍵時,它會生成錯誤索引超出范圍。 必須為非負數並且小於集合的大小。 參數名稱:索引
static public DataTable gdt;
private void btnAdd_Click(object sender, EventArgs e)
{
try
{
if (txtItemCode.Text.Trim() == "")
{
MessageBox.Show("Enter Item Code");
txtItemCode.Focus();
return;
}
if (txtQty.Text.Trim() == "")
{
MessageBox.Show("Enter Qty");
txtQty.Focus();
return;
}
if (Convert.ToInt32(txtQty.Text.Trim()) <= 0)
{
MessageBox.Show("Qty must be greater than 0");
txtQty.Focus();
return;
}
if (btnAdd.Text == "ADD")
{
DataRow[] dr = gdt.Select("Item_Code = '" + txtItemCode.Text.Trim() + "'");
if (dr.Length > 0)
{
MessageBox.Show("Item Code Already Exist.");
txtItemCode.Text = "";
txtItemCode.Focus();
return;
}
tblItemMasterBLL oItem = new tblItemMasterBLL();
int ItemID = 0;
DataTable dt = new DataTable();
dt = oItem.getItemDetailByItemCode(txtItemCode.Text.Trim());
if (dt.Rows.Count > 0)
{
ItemID = Convert.ToInt32(dt.Rows[0]["Item_ID"]);
gdt.Rows.Add();
gdt.Rows[gdt.Rows.Count - 1]["Item_Code"] = txtItemCode.Text.Trim();
gdt.Rows[gdt.Rows.Count - 1]["Item_ID"] = ItemID;
gdt.Rows[gdt.Rows.Count - 1]["Qty"] = txtQty.Text.Trim();
gdt.Rows[gdt.Rows.Count - 1]["Article_Desc"] = Convert.ToString(dt.Rows[0]["Article_Desc"]);
gdt.Rows[gdt.Rows.Count - 1]["Color_Desc"] = Convert.ToString(dt.Rows[0]["Color_Desc"]);
gdt.Rows[gdt.Rows.Count - 1]["Size_Desc"] = Convert.ToString(dt.Rows[0]["Size_Desc"]);
gdt.Rows[gdt.Rows.Count - 1]["MRP"] = Convert.ToString(dt.Rows[0]["MRP"]);
dgv_Items.DataSource = null;
dgv_Items.DataSource = gdt;
}
else
{
MessageBox.Show("Invalid Item Code");
}
txtItemCode.Text = "";
txtQty.Text = "";
}
else if (btnAdd.Text == "UPDATE")
{
if (gdt.Rows.Count > 0)
{
gdt.Rows[Convert.ToInt32(lblhdnRowIndex.Text)]["Qty"] = txtQty.Text.Trim();
dgv_Items.Rows[Convert.ToInt32(lblhdnRowIndex.Text)].Cells["Qty"].Value = txtQty.Text.Trim();
}
txtItemCode.ReadOnly = false;
txtItemCode.Text = "";
txtQty.Text = "";
lblhdnItemID.Text = "";
lblhdnItemCode.Text = "";
lblhdnQty.Text = "";
btnAdd.Text = "ADD";
lblhdnRowIndex.Text = "";
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void dgv_Items_UserDeletingRow(object sender, DataGridViewRowCancelEventArgs e)
{
try
{
if (MessageBox.Show("Do you want to delete the current row?", "Confirm deletion",
MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
ScrollPosition = 0;
ScrollPosition = dgv_Items.FirstDisplayedScrollingRowIndex;
int iIndex = dgv_Items.CurrentRow.Index;
gdt.Rows.RemoveAt(iIndex);
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void dgv_Items_UserDeletedRow(object sender, DataGridViewRowEventArgs e)
{
try
{
dgv_Items.DataSource = null;
dgv_Items.DataSource = gdt;
dgv_Items.Rows[dgv_Items.Rows.Count - 1].Visible = false;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
怎么樣 ..
ScrollPosition = 0;
dgv_Items.FirstDisplayedScrollingRowIndex=ScrollPosition;
int iIndex = dgv_Items.CurrentRow.Index;
gdt.Rows.RemoveAt(iIndex);
謝謝大家參與解決我的問題。 實際上這是索引問題。 我找到了解決方案,在其中我對Datagridview的UserDeletingRow事件進行了更改。 我在UserDeletingRow中添加了新行,即使它是粗體。 現在我的代碼運行正常。
private void dgv_Items_UserDeletingRow(object sender, DataGridViewRowCancelEventArgs e)
{
try
{
if (MessageBox.Show("Do you want to delete the current row?", "Confirm deletion",
MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
{
ScrollPosition = 0;
ScrollPosition = dgv_Items.FirstDisplayedScrollingRowIndex;
int iIndex = dgv_Items.CurrentRow.Index;
DataRow dr = gdt.Rows[iIndex]; //new added code
gdt.Rows.RemoveAt(iIndex);
gdt.Rows.InsertAt(dr, iIndex); //new added code
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
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