C# gridview中的文本框不自动回发

My

gridview

回发时缺少以前的数据。下面是一个场景，当我从

gvFinalized

gridview中检测到库存不足时，我会得到类别，然后我会得到库存最高的产品，并显示在

gvSuggered

gridview中

但假设在我的

gvFinalized

中，有三种不同类别的产品是不够的，比如面条、罐头食品和饮料。它应该展示三种不同的产品，每种产品都来自

gv

中的不同类别

然而，我现在的问题是，它只显示最后的项目。例如，在此场景中，饮料。饮料前的数据被抹掉了

以下是我如何检测库存不足的代码：

protected void tbQuantity_TextChanged(object sender, EventArgs e)
{
    tempList = new Dictionary<string, string>();
    distSPUItemList = new Dictionary<string, int>();
    bool valid = true;
    string quantityStr = "", prodID = "";
    int packagesNeeded = 0, totalUnit = 0, quantity = 0;

    //Get the total packages needed for this distribution
    packagesNeeded = prodPackBLL.getPackagesNeededByDistributionID(distributionID);

    foreach (GridViewRow gr in gvFinalised.Rows)
    {
        //Clear label error message
        Label lblCheckAmount = gr.FindControl("lblCheckAmount") as Label;
        lblCheckAmount.Text = "";

        //Get the product variant ID which set as DataKeyNames and product quantity from selected row index
        prodID = gvFinalised.DataKeys[gr.RowIndex].Value.ToString();

        var tbQuantity = gr.FindControl("tbQuantity") as TextBox;
        if (tbQuantity != null)
        {
            //Check if the input is numeric
            quantityStr = tbQuantity.Text;
            if (!int.TryParse(quantityStr, out quantity))
            {
                lblCheckAmount.Text = "Non-numeric input!";
                TextBox tb = (TextBox)gr.FindControl("tbQuantity") as TextBox;
            }
            else
            {
                //Add both objects into Dictionary
                tempList.Add(prodID, quantityStr);
            }
        }
    }

    //Portion to check the storage level for each products stored in tempList
    //Loop thru tempList. key as prod variant ID, tempList.Keys as quantity
    foreach (string key in tempList.Keys)
    {
        //Get total unit of each products
        totalUnit = prodPackBLL.getTotalProductUnit(key);
        valid = true;

        //Check if unitQuantity exceed storage level
        if (((Convert.ToInt32(tempList[key])) * packagesNeeded) > totalUnit)
        {
            //Get the label control in gridview
            foreach (GridViewRow gr in gvFinalised.Rows)
            {
                if (key == gvFinalised.DataKeys[gr.RowIndex].Value.ToString())
                {
                    //Change the color of textBox and display the insufficient message
                    valid = false;
                    //Automatically uncheck the checkBox if invalid
                    TextBox tb = (TextBox)gr.FindControl("tbQuantity") as TextBox;
                    Label lblCheckAmount = gr.FindControl("lblCheckAmount") as Label;
                    lblCheckAmount.Text = "Insufficient stock!";

                    //Here is the place where I collect the data and display in gvSuggested
                    getSuggested(key);
                }
            }
        }
        else
        {
            if (totalUnit - ((Convert.ToInt32(tempList[key])) * packagesNeeded) == 0)
            {

                foreach (GridViewRow gr in gvFinalised.Rows)
                {
                    if (key == gvFinalised.DataKeys[gr.RowIndex].Value.ToString())
                    {
                        valid = true;
                        Label lblCheckAmount = gr.FindControl("lblCheckAmount") as Label;
                        lblCheckAmount.Attributes["style"] = "color:#ffb848";
                        lblCheckAmount.Text = "Stock becomes 0!";
                    }
                }
            }
        }

        //Portion to check for valid products to be inserted into distSPUItemList
        if (valid)
        {
            //Set the textBox color
            foreach (GridViewRow gr in gvFinalised.Rows)
            {
                if (key == gvFinalised.DataKeys[gr.RowIndex].Value.ToString())
                {
                    TextBox tb = (TextBox)gr.FindControl("tbQuantity") as TextBox;
                }
            }
            //Validated items store into another list to perform Sql statement when button on click
            distSPUItemList.Add(key, (Convert.ToInt32(tempList[key]) * packagesNeeded));
        }
    }
}

this.SuggestedItems = distSPUItem; 

回发时，我使用

viewState

存储数据。但是，它不起作用。中的这一行建议：

protected void tbQuantity_TextChanged(object sender, EventArgs e)
{
    tempList = new Dictionary<string, string>();
    distSPUItemList = new Dictionary<string, int>();
    bool valid = true;
    string quantityStr = "", prodID = "";
    int packagesNeeded = 0, totalUnit = 0, quantity = 0;

    //Get the total packages needed for this distribution
    packagesNeeded = prodPackBLL.getPackagesNeededByDistributionID(distributionID);

    foreach (GridViewRow gr in gvFinalised.Rows)
    {
        //Clear label error message
        Label lblCheckAmount = gr.FindControl("lblCheckAmount") as Label;
        lblCheckAmount.Text = "";

        //Get the product variant ID which set as DataKeyNames and product quantity from selected row index
        prodID = gvFinalised.DataKeys[gr.RowIndex].Value.ToString();

        var tbQuantity = gr.FindControl("tbQuantity") as TextBox;
        if (tbQuantity != null)
        {
            //Check if the input is numeric
            quantityStr = tbQuantity.Text;
            if (!int.TryParse(quantityStr, out quantity))
            {
                lblCheckAmount.Text = "Non-numeric input!";
                TextBox tb = (TextBox)gr.FindControl("tbQuantity") as TextBox;
            }
            else
            {
                //Add both objects into Dictionary
                tempList.Add(prodID, quantityStr);
            }
        }
    }

    //Portion to check the storage level for each products stored in tempList
    //Loop thru tempList. key as prod variant ID, tempList.Keys as quantity
    foreach (string key in tempList.Keys)
    {
        //Get total unit of each products
        totalUnit = prodPackBLL.getTotalProductUnit(key);
        valid = true;

        //Check if unitQuantity exceed storage level
        if (((Convert.ToInt32(tempList[key])) * packagesNeeded) > totalUnit)
        {
            //Get the label control in gridview
            foreach (GridViewRow gr in gvFinalised.Rows)
            {
                if (key == gvFinalised.DataKeys[gr.RowIndex].Value.ToString())
                {
                    //Change the color of textBox and display the insufficient message
                    valid = false;
                    //Automatically uncheck the checkBox if invalid
                    TextBox tb = (TextBox)gr.FindControl("tbQuantity") as TextBox;
                    Label lblCheckAmount = gr.FindControl("lblCheckAmount") as Label;
                    lblCheckAmount.Text = "Insufficient stock!";

                    //Here is the place where I collect the data and display in gvSuggested
                    getSuggested(key);
                }
            }
        }
        else
        {
            if (totalUnit - ((Convert.ToInt32(tempList[key])) * packagesNeeded) == 0)
            {

                foreach (GridViewRow gr in gvFinalised.Rows)
                {
                    if (key == gvFinalised.DataKeys[gr.RowIndex].Value.ToString())
                    {
                        valid = true;
                        Label lblCheckAmount = gr.FindControl("lblCheckAmount") as Label;
                        lblCheckAmount.Attributes["style"] = "color:#ffb848";
                        lblCheckAmount.Text = "Stock becomes 0!";
                    }
                }
            }
        }

        //Portion to check for valid products to be inserted into distSPUItemList
        if (valid)
        {
            //Set the textBox color
            foreach (GridViewRow gr in gvFinalised.Rows)
            {
                if (key == gvFinalised.DataKeys[gr.RowIndex].Value.ToString())
                {
                    TextBox tb = (TextBox)gr.FindControl("tbQuantity") as TextBox;
                }
            }
            //Validated items store into another list to perform Sql statement when button on click
            distSPUItemList.Add(key, (Convert.ToInt32(tempList[key]) * packagesNeeded));
        }
    }
}

this.SuggestedItems = distSPUItem; 

---

导致gridView中的文本框无法自动回发。如果我删除了它，上面的错误会再次出现。有导游吗？提前感谢。

请启用tbQuantity文本框EnableAutoPostBack=True

有人知道原因吗？这是因为viewState问题还是我的逻辑问题？您是否将

[Serializable]

属性添加到

分发标准打包单元项

类中？@afzalugh它可以工作。但为什么我需要在类前面添加[Serializable]？在ViewState中保存列表时，需要序列化它们。看见我想知道为什么你没有得到任何错误！我以前有过这样的经历，当我忘记将我的类标记为可序列化时，列表中只保存了一个元素！我相信你的问题值得投票表决！由于情况复杂，这个问题没有得到足够的重视。